THIRD-PARTY NOTICES Asset Acrobatics City: the Unreal Engine web runtime of this game Version 1, 2026-11-12. This file holds the copyright notices and licence texts of the third-party software in the Unreal Engine web runtime of this game (the WebAssembly binary, its JavaScript glue and the page that loads them) and of the third-party fonts and data that come with the engine in the game's data files (section 12). Further third-party code, in the binary and in the game's compiled shaders, and the points still open are listed under GAPS; the code's licence texts are still to be added. On the game's site, the short NOTICES.txt beside this file is the one line Unreal Engine stages by itself; this file is the full text. The game's own content and any asset packs are credited on the Credits page of www.assetacrobatics.com, not here. Built with Unreal Engine 5.9 Preview 1 (CL 60351404) and emscripten 6.0.10. Each section names the file its text was copied from. Copies are exact except: line endings, the "// " comment markers of the Dawn and glint texts (their files are C++ and shader comments), and non-ASCII characters written in ASCII ((c) for the copyright sign, (R) for the registered sign, plain letters for accented ones, - for the en dash). Contents 1. Unreal Engine (Epic Games, Inc.) 2. FreeType 2.14.1 3. Dawn: emdawnwebgpu (WebGPU for emscripten) 4. Emscripten 6.0.10: JavaScript runtime and system libraries 5. musl libc (in emscripten) 6. LLVM libc++, libc++abi and compiler-rt (in emscripten) 7. zlib 1.3 8. Opus 1.1 9. libpng 1.6.44 10. BLAKE3 1.3.1 11. Epic components (no third-party notice) 12. Fonts and lookup tables that come with Unreal Engine GAPS (not yet complete) ============================================================================== 1. Unreal Engine (Epic Games, Inc.) ============================================================================== What: the engine this game is built with Licence: Unreal Engine End User License Agreement Source of the lines: the Unreal Engine EULA, section 6(a), in Epic's PDF of 2022 Asset Acrobatics City uses Unreal Engine. Unreal is a trademark or registered trademark of Epic Games, Inc. in the United States of America and elsewhere. Unreal(R) Engine, Copyright 1998 - 2026, Epic Games, Inc. All rights reserved. ============================================================================== 2. FreeType 2.14.1 ============================================================================== What: font rendering, linked into the game (the BDF, PCF, gzip, LZW, SDF and SVG modules included) Copyright: Copyright (C) 1996-2025 by David Turner, Robert Wilhelm, and Werner Lemberg Licence: The FreeType Project LICENSE (FTL), which asks for this credit in the documentation Source of the copyright: UE 5.9 Preview 1: Engine/Source/ThirdParty/FreeType2/FreeType2-2.14.1/include/freetype/freetype.h (its header) Source of the credit: UE 5.9 Preview 1: Engine/Source/ThirdParty/Licenses/NOTICES.txt (the line Unreal Engine stages as NOTICES.txt) Source of fthash: UE 5.9 Preview 1: Engine/Source/ThirdParty/FreeType2/FreeType2-2.14.1/include/freetype/internal/fthash.h (its header) Portions of this software are copyright (c) The FreeType Project (http://www.freetype.org). All rights reserved. Portions of this software are copyright (c) 2025 The FreeType Project (https://freetype.org). All rights reserved. The second line is the credit in the form the FTL asks for, with the year of FreeType 2.14.1 (FTL text: UE 5.9 Preview 1: Engine/Source/ThirdParty/Licenses/Freetype2.14.1_License.TXT). FreeType's hash functions (fthash, taken from its BDF driver) carry their own licence: /* * Copyright 2000 Computing Research Labs, New Mexico State University * Copyright 2001-2015 * Francesco Zappa Nardelli * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COMPUTING RESEARCH LAB OR NEW MEXICO STATE UNIVERSITY BE LIABLE FOR ANY * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT * OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ ============================================================================== 3. Dawn: emdawnwebgpu (WebGPU for emscripten) ============================================================================== What: Dawn's webgpu.h for emscripten (C++ and JavaScript), linked into every web build Version: Dawn chromium/8059, emdawnwebgpu package Copyright: Copyright 2017-2025 The Dawn & Tint Authors Licence: BSD-3-Clause Source of the text: UE 5.9 Preview 1: Engine/Platforms/Wasm/Build/ThirdParty/emdawnwebgpu/webgpu_cpp/LICENSE (comment markers dropped) Copyright 2017-2025 The Dawn & Tint Authors Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Its JavaScript bindings (webgpu/src) are a fork of emscripten's WebGPU bindings, under emscripten's MIT and University of Illinois/NCSA licences: Copyright (c) 2010-2014 Emscripten authors. Their licence file, UE 5.9 Preview 1: Engine/Platforms/Wasm/Build/ThirdParty/emdawnwebgpu/webgpu/src/LICENSE, is the first part of the emscripten text in section 4 (everything before its Node.js note). ============================================================================== 4. Emscripten 6.0.10: JavaScript runtime and system libraries ============================================================================== What: the JavaScript runtime and emscripten's system libraries (its parts of the C library, the emmalloc allocator, WasmFS and the others it links); in every web build Version: emscripten 6.0.10 (d6c521a7f054) Copyright: Copyright (c) 2010-2014 Emscripten authors, see AUTHORS file Licence: MIT and University of Illinois/NCSA (dual) Source of the text: emsdk 6.0.10: upstream/emscripten/LICENSE Emscripten is available under 2 licenses, the MIT license and the University of Illinois/NCSA Open Source License. Both are permissive open source licenses, with little if any practical difference between them. The reason for offering both is that (1) the MIT license is well-known, while (2) the University of Illinois/NCSA Open Source License allows Emscripten's code to be integrated upstream into LLVM, which uses that license, should the opportunity arise. The full text of both licenses follows. ============================================================================== Copyright (c) 2010-2014 Emscripten authors, see AUTHORS file. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ============================================================================== Copyright (c) 2010-2014 Emscripten authors, see AUTHORS file. All rights reserved. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal with the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimers. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimers in the documentation and/or other materials provided with the distribution. Neither the names of Mozilla, nor the names of its contributors may be used to endorse or promote products derived from this Software without specific prior written permission. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE. ============================================================================== This program uses portions of Node.js source code located in src/library_path.js, in accordance with the terms of the MIT license. Node's license follows: """ Copyright Joyent, Inc. and other Node contributors. All rights reserved. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. """ The musl libc project is bundled in this repo, and it has the MIT license, see system/lib/libc/musl/COPYRIGHT The third_party/ subdirectory contains code with other licenses. None of it is used by default, but certain options use it (e.g., the optional closure compiler flag will run closure compiler from third_party/). The WasmFS fetch backend in every web build is emscripten's src/lib/libwasmfs_fetch.js, modified by Epic Games, Inc. (the changes are listed in the file's header), under the MIT licence above. Its notice reads "Copyright 2022 The Emscripten Authors" and "SPDX-License-Identifier: MIT" (UE 5.9 Preview 1: Engine/Platforms/Wasm/Build/Link/wasmfs_fetch.js (its header)). ============================================================================== 5. musl libc (in emscripten) ============================================================================== What: the C library emscripten builds its own from; linked into every web build Copyright: Copyright (c) 2005-2020 Rich Felker, et al. Licence: MIT Source of the text: emsdk 6.0.10: upstream/emscripten/system/lib/libc/musl/COPYRIGHT musl as a whole is licensed under the following standard MIT license: ---------------------------------------------------------------------- Copyright (c) 2005-2020 Rich Felker, et al. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ---------------------------------------------------------------------- Authors/contributors include: A. Wilcox Ada Worcester Alex Dowad Alex Suykov Alexander Monakov Andre McCurdy Andrew Kelley Anthony G. Basile Aric Belsito Arvid Picciani Bartosz Brachaczek Benjamin Peterson Bobby Bingham Boris Brezillon Brent Cook Chris Spiegel Clement Vasseur Daniel Micay Daniel Sabogal Daurnimator David Carlier David Edelsohn Denys Vlasenko Dmitry Ivanov Dmitry V. Levin Drew DeVault Emil Renner Berthing Fangrui Song Felix Fietkau Felix Janda Gianluca Anzolin Hauke Mehrtens He X Hiltjo Posthuma Isaac Dunham Jaydeep Patil Jens Gustedt Jeremy Huntwork Jo-Philipp Wich Joakim Sindholt John Spencer Julien Ramseier Justin Cormack Kaarle Ritvanen Khem Raj Kylie McClain Leah Neukirchen Luca Barbato Luka Perkov Lynn Ochs M Farkas-Dyck (Strake) Mahesh Bodapati Markus Wichmann Masanori Ogino Michael Clark Michael Forney Mikhail Kremnyov Natanael Copa Nicholas J. Kain orc Pascal Cuoq Patrick Oppenlander Petr Hosek Petr Skocik Pierre Carrier Reini Urban Rich Felker Richard Pennington Ryan Fairfax Samuel Holland Segev Finer Shiz sin Solar Designer Stefan Kristiansson Stefan O'Rear Szabolcs Nagy Timo Teras Trutz Behn Will Dietz William Haddon William Pitcock Portions of this software are derived from third-party works licensed under terms compatible with the above MIT license: The TRE regular expression implementation (src/regex/reg* and src/regex/tre*) is Copyright (c) 2001-2008 Ville Laurikari and licensed under a 2-clause BSD license (license text in the source files). The included version has been heavily modified by Rich Felker in 2012, in the interests of size, simplicity, and namespace cleanliness. Much of the math library code (src/math/* and src/complex/*) is Copyright (c) 1993,2004 Sun Microsystems or Copyright (c) 2003-2011 David Schultz or Copyright (c) 2003-2009 Steven G. Kargl or Copyright (c) 2003-2009 Bruce D. Evans or Copyright (c) 2008 Stephen L. Moshier or Copyright (c) 2017-2018 Arm Limited and labelled as such in comments in the individual source files. All have been licensed under extremely permissive terms. The ARM memcpy code (src/string/arm/memcpy.S) is Copyright (c) 2008 The Android Open Source Project and is licensed under a two-clause BSD license. It was taken from Bionic libc, used on Android. The AArch64 memcpy and memset code (src/string/aarch64/*) are Copyright (c) 1999-2019, Arm Limited. The implementation of DES for crypt (src/crypt/crypt_des.c) is Copyright (c) 1994 David Burren. It is licensed under a BSD license. The implementation of blowfish crypt (src/crypt/crypt_blowfish.c) was originally written by Solar Designer and placed into the public domain. The code also comes with a fallback permissive license for use in jurisdictions that may not recognize the public domain. The smoothsort implementation (src/stdlib/qsort.c) is Copyright (c) 2011 Lynn Ochs and is licensed under an MIT-style license. The x86_64 port was written by Nicholas J. Kain and is licensed under the standard MIT terms. The mips and microblaze ports were originally written by Richard Pennington for use in the ellcc project. The original code was adapted by Rich Felker for build system and code conventions during upstream integration. It is licensed under the standard MIT terms. The mips64 port was contributed by Imagination Technologies and is licensed under the standard MIT terms. The powerpc port was also originally written by Richard Pennington, and later supplemented and integrated by John Spencer. It is licensed under the standard MIT terms. All other files which have no copyright comments are original works produced specifically for use as part of this library, written either by Rich Felker, the main author of the library, or by one or more contibutors listed above. Details on authorship of individual files can be found in the git version control history of the project. The omission of copyright and license comments in each file is in the interest of source tree size. In addition, permission is hereby granted for all public header files (include/* and arch/*/bits/*) and crt files intended to be linked into applications (crt/*, ldso/dlstart.c, and arch/*/crt_arch.h) to omit the copyright notice and permission notice otherwise required by the license, and to use these files without any requirement of attribution. These files include substantial contributions from: Bobby Bingham John Spencer Nicholas J. Kain Rich Felker Richard Pennington Stefan Kristiansson Szabolcs Nagy all of whom have explicitly granted such permission. This file previously contained text expressing a belief that most of the files covered by the above exception were sufficiently trivial not to be subject to copyright, resulting in confusion over whether it negated the permissions granted in the license. In the spirit of permissive licensing, and of not having licensing issues being an obstacle to adoption, that text has been removed. ============================================================================== 6. LLVM libc++, libc++abi and compiler-rt (in emscripten) ============================================================================== What: the C++ standard library, its ABI library and the compiler's runtime builtins; linked into every web build Licence: Apache-2.0 WITH LLVM-exception; the legacy University of Illinois/NCSA and MIT licences Sources of the text: emsdk 6.0.10: upstream/emscripten/system/lib/libcxx/LICENSE.TXT emsdk 6.0.10: upstream/emscripten/system/lib/libcxxabi/LICENSE.TXT emsdk 6.0.10: upstream/emscripten/system/lib/compiler-rt/LICENSE.TXT How it is laid out: the three files are the same in lines 1-235 (part A, once); part B is each file's own lines 236-311, which name the library (and compiler-rt's MIT copyright years) Part A: lines 1-235 of each of the three files ------------------------------------------------------------------------------ ============================================================================== The LLVM Project is under the Apache License v2.0 with LLVM Exceptions: ============================================================================== Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. "License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document. "Licensor" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License. "Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. For the purposes of this definition, "control" means (i) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the outstanding shares, or (iii) beneficial ownership of such entity. "You" (or "Your") shall mean an individual or Legal Entity exercising permissions granted by this License. "Source" form shall mean the preferred form for making modifications, including but not limited to software source code, documentation source, and configuration files. 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We also recommend that a file or class name and description of purpose be included on the same "printed page" as the copyright notice for easier identification within third-party archives. Copyright [yyyy] [name of copyright owner] Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. ---- LLVM Exceptions to the Apache 2.0 License ---- As an exception, if, as a result of your compiling your source code, portions of this Software are embedded into an Object form of such source code, you may redistribute such embedded portions in such Object form without complying with the conditions of Sections 4(a), 4(b) and 4(d) of the License. In addition, if you combine or link compiled forms of this Software with software that is licensed under the GPLv2 ("Combined Software") and if a court of competent jurisdiction determines that the patent provision (Section 3), the indemnity provision (Section 9) or other Section of the License conflicts with the conditions of the GPLv2, you may retroactively and prospectively choose to deem waived or otherwise exclude such Section(s) of the License, but only in their entirety and only with respect to the Combined Software. ============================================================================== Software from third parties included in the LLVM Project: ============================================================================== The LLVM Project contains third party software which is under different license terms. All such code will be identified clearly using at least one of two mechanisms: 1) It will be in a separate directory tree with its own `LICENSE.txt` or `LICENSE` file at the top containing the specific license and restrictions which apply to that software, or 2) It will contain specific license and restriction terms at the top of every file. Part B for libc++: lines 236-311 of libcxx/LICENSE.TXT ------------------------------------------------------------------------------ ============================================================================== Legacy LLVM License (https://llvm.org/docs/DeveloperPolicy.html#legacy): ============================================================================== The libc++ library is dual licensed under both the University of Illinois "BSD-Like" license and the MIT license. As a user of this code you may choose to use it under either license. As a contributor, you agree to allow your code to be used under both. Full text of the relevant licenses is included below. ============================================================================== University of Illinois/NCSA Open Source License Copyright (c) 2009-2019 by the contributors listed in CREDITS.TXT All rights reserved. Developed by: LLVM Team University of Illinois at Urbana-Champaign http://llvm.org Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal with the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimers. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimers in the documentation and/or other materials provided with the distribution. * Neither the names of the LLVM Team, University of Illinois at Urbana-Champaign, nor the names of its contributors may be used to endorse or promote products derived from this Software without specific prior written permission. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE. ============================================================================== Copyright (c) 2009-2014 by the contributors listed in CREDITS.TXT Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Part B for libc++abi: lines 236-311 of libcxxabi/LICENSE.TXT ------------------------------------------------------------------------------ ============================================================================== Legacy LLVM License (https://llvm.org/docs/DeveloperPolicy.html#legacy): ============================================================================== The libc++abi library is dual licensed under both the University of Illinois "BSD-Like" license and the MIT license. As a user of this code you may choose to use it under either license. As a contributor, you agree to allow your code to be used under both. Full text of the relevant licenses is included below. ============================================================================== University of Illinois/NCSA Open Source License Copyright (c) 2009-2019 by the contributors listed in CREDITS.TXT All rights reserved. Developed by: LLVM Team University of Illinois at Urbana-Champaign http://llvm.org Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal with the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimers. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimers in the documentation and/or other materials provided with the distribution. * Neither the names of the LLVM Team, University of Illinois at Urbana-Champaign, nor the names of its contributors may be used to endorse or promote products derived from this Software without specific prior written permission. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE. ============================================================================== Copyright (c) 2009-2014 by the contributors listed in CREDITS.TXT Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Part B for compiler-rt: lines 236-311 of compiler-rt/LICENSE.TXT ------------------------------------------------------------------------------ ============================================================================== Legacy LLVM License (https://llvm.org/docs/DeveloperPolicy.html#legacy): ============================================================================== The compiler_rt library is dual licensed under both the University of Illinois "BSD-Like" license and the MIT license. As a user of this code you may choose to use it under either license. As a contributor, you agree to allow your code to be used under both. Full text of the relevant licenses is included below. ============================================================================== University of Illinois/NCSA Open Source License Copyright (c) 2009-2019 by the contributors listed in CREDITS.TXT All rights reserved. Developed by: LLVM Team University of Illinois at Urbana-Champaign http://llvm.org Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal with the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimers. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimers in the documentation and/or other materials provided with the distribution. * Neither the names of the LLVM Team, University of Illinois at Urbana-Champaign, nor the names of its contributors may be used to endorse or promote products derived from this Software without specific prior written permission. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE. ============================================================================== Copyright (c) 2009-2015 by the contributors listed in CREDITS.TXT Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ============================================================================== 7. zlib 1.3 ============================================================================== What: compression; the engine's zlib 1.3, rebuilt for the web (Engine/Platforms/Wasm/Source/ThirdParty/zlib/ zlib_Wasm.Build.cs; the binary says "deflate 1.3" and "inflate 1.3") Copyright: Copyright (C) 1995-2023 Jean-loup Gailly and Mark Adler Licence: zlib Source of the text: UE 5.9 Preview 1: Engine/Source/ThirdParty/Licenses/Zlib_License.txt /* zlib.h -- interface of the 'zlib' general purpose compression library version 1.3, August 18th, 2023 Copyright (C) 1995-2023 Jean-loup Gailly and Mark Adler This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software. Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions: 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. 3. This notice may not be removed or altered from any source distribution. Jean-loup Gailly Mark Adler jloup@gzip.org madler@alumni.caltech.edu */ ============================================================================== 8. Opus 1.1 ============================================================================== What: the Opus audio decoder (libopus 1.1), linked for the engine's voice module Copyright: Copyright 2001-2011 Xiph.Org, Skype Limited, Octasic, Jean-Marc Valin, Timothy B. Terriberry, CSIRO, Gregory Maxwell, Mark Borgerding, Erik de Castro Lopo Licence: BSD-3-Clause Source of the text: UE 5.9 Preview 1: Engine/Source/ThirdParty/Licenses/Opus_License.txt Copyright 2001-2011 Xiph.Org, Skype Limited, Octasic, Jean-Marc Valin, Timothy B. Terriberry, CSIRO, Gregory Maxwell, Mark Borgerding, Erik de Castro Lopo Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. - Neither the name of Internet Society, IETF or IETF Trust, nor the names of specific contributors, may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Opus is subject to the royalty-free patent licenses which are specified at: Xiph.Org Foundation: https://datatracker.ietf.org/ipr/1524/ Microsoft Corporation: https://datatracker.ietf.org/ipr/1914/ Broadcom Corporation: https://datatracker.ietf.org/ipr/1526/ ============================================================================== 9. libpng 1.6.44 ============================================================================== What: PNG image decoding Copyright: Copyright (c) 1995-2025 The PNG Reference Library Authors, and the others named below Licence: PNG Reference Library License version 2 (it asks for no notice with binaries; given in full) Source of the text: UE 5.9 Preview 1: Engine/Source/ThirdParty/Licenses/libPNG_v1.6.44_License.txt COPYRIGHT NOTICE, DISCLAIMER, and LICENSE ========================================= PNG Reference Library License version 2 --------------------------------------- * Copyright (c) 1995-2025 The PNG Reference Library Authors. * Copyright (c) 2018-2025 Cosmin Truta. * Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson. * Copyright (c) 1996-1997 Andreas Dilger. * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc. The software is supplied "as is", without warranty of any kind, express or implied, including, without limitation, the warranties of merchantability, fitness for a particular purpose, title, and non-infringement. In no event shall the Copyright owners, or anyone distributing the software, be liable for any damages or other liability, whether in contract, tort or otherwise, arising from, out of, or in connection with the software, or the use or other dealings in the software, even if advised of the possibility of such damage. Permission is hereby granted to use, copy, modify, and distribute this software, or portions hereof, for any purpose, without fee, subject to the following restrictions: 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated, but is not required. 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. 3. This Copyright notice may not be removed or altered from any source or altered source distribution. PNG Reference Library License version 1 (for libpng 0.5 through 1.6.35) ----------------------------------------------------------------------- libpng versions 1.0.7, July 1, 2000, through 1.6.35, July 15, 2018 are Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson, are derived from libpng-1.0.6, and are distributed according to the same disclaimer and license as libpng-1.0.6 with the following individuals added to the list of Contributing Authors: Simon-Pierre Cadieux Eric S. Raymond Mans Rullgard Cosmin Truta Gilles Vollant James Yu Mandar Sahastrabuddhe Google Inc. Vadim Barkov and with the following additions to the disclaimer: There is no warranty against interference with your enjoyment of the library or against infringement. There is no warranty that our efforts or the library will fulfill any of your particular purposes or needs. This library is provided with all faults, and the entire risk of satisfactory quality, performance, accuracy, and effort is with the user. Some files in the "contrib" directory and some configure-generated files that are distributed with libpng have other copyright owners, and are released under other open source licenses. libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are Copyright (c) 1998-2000 Glenn Randers-Pehrson, are derived from libpng-0.96, and are distributed according to the same disclaimer and license as libpng-0.96, with the following individuals added to the list of Contributing Authors: Tom Lane Glenn Randers-Pehrson Willem van Schaik libpng versions 0.89, June 1996, through 0.96, May 1997, are Copyright (c) 1996-1997 Andreas Dilger, are derived from libpng-0.88, and are distributed according to the same disclaimer and license as libpng-0.88, with the following individuals added to the list of Contributing Authors: John Bowler Kevin Bracey Sam Bushell Magnus Holmgren Greg Roelofs Tom Tanner Some files in the "scripts" directory have other copyright owners, but are released under this license. libpng versions 0.5, May 1995, through 0.88, January 1996, are Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc. For the purposes of this copyright and license, "Contributing Authors" is defined as the following set of individuals: Andreas Dilger Dave Martindale Guy Eric Schalnat Paul Schmidt Tim Wegner The PNG Reference Library is supplied "AS IS". The Contributing Authors and Group 42, Inc. disclaim all warranties, expressed or implied, including, without limitation, the warranties of merchantability and of fitness for any purpose. The Contributing Authors and Group 42, Inc. assume no liability for direct, indirect, incidental, special, exemplary, or consequential damages, which may result from the use of the PNG Reference Library, even if advised of the possibility of such damage. Permission is hereby granted to use, copy, modify, and distribute this source code, or portions hereof, for any purpose, without fee, subject to the following restrictions: 1. The origin of this source code must not be misrepresented. 2. Altered versions must be plainly marked as such and must not be misrepresented as being the original source. 3. This Copyright notice may not be removed or altered from any source or altered source distribution. The Contributing Authors and Group 42, Inc. specifically permit, without fee, and encourage the use of this source code as a component to supporting the PNG file format in commercial products. If you use this source code in a product, acknowledgment is not required but would be appreciated. ============================================================================== 10. BLAKE3 1.3.1 ============================================================================== What: the BLAKE3 hash Licence: CC0 1.0 (public domain dedication), or Apache License 2.0 Used under: CC0 1.0, which asks for no notice; listed for completeness Source: UE 5.9 Preview 1: Engine/Source/ThirdParty/Licenses/Blake3_License.txt (its first two lines) This work is released into the public domain with CC0 1.0. Alternatively, it is licensed under the Apache License 2.0. ============================================================================== 11. Epic components (no third-party notice) ============================================================================== What: Oodle Data 2.9.16 (with its SIMD128 overlay), Bink Audio, RAD Audio, the Oodle and Oodle Network stubs Licence: Epic Games proprietary, under the Unreal Engine EULA (Engine/Platforms/Wasm/Docs/THIRD-PARTY.md) ============================================================================== 12. Fonts and lookup tables that come with Unreal Engine ============================================================================== What: third-party content from the engine in the game's data files (its .pak and .ucas): the fonts of the engine's UI framework, Slate (Engine/Content/Slate/Fonts, and one more Roboto Bold in Slate/Old/Tiles), the font faces of /Engine/EngineFonts/Faces and its distance-field font, and the lookup tables of the engine's glint and sheen shading and of its SMAA anti-aliasing. Other third-party data in those files: the two settings assets of the Animation Compression Library plugin (with its code in GAPS 1) and three blue-noise textures whose source is not established (GAPS 8) Sources: each font's own name table (its copyright and licence fields), and the files named below Roboto: 10 font files in Slate/Fonts (Roboto, Roboto Bk, Roboto Cn, Roboto Light and Roboto Medium), the copy of Roboto Bold in Slate/Old/Tiles, 5 font faces (Regular, Bold, Italic, Bold Italic and Light), and the distance-field font /Engine/EngineFonts/RobotoDistanceField (Roboto glyphs rendered into a texture) Copyright: "Font data copyright Google 2011" (version 1.00000); "Copyright 2011 Google Inc. All Rights Reserved." (Roboto Light and Roboto Medium, version 2.137) Trademark: "Roboto is a trademark of Google." Licence: Apache License, Version 2.0; its text is in section 6, without the LLVM exceptions that follow it there. Epic's licence file for the fonts says so (UE 5.9 Preview 1: Engine/Source/ThirdParty/Licenses/ROBOTO_License.txt), and so do the licence fields of the version 2.137 fonts. Droid Sans Fallback: 1 font file in Slate/Fonts and 1 font face Copyright: "Digitized data copyright Google Corporation (c) 2006" Trademark: "Droid is a trademark of Google and may be registered in certain jurisdictions." Licence: Apache License, Version 2.0, as the font's licence field says; its text is in section 6. Droid Sans Mono: 1 font file in Slate/Fonts (version 1.00 build 107) Copyright: "Digitized data copyright (c) 2006, Google Corporation." Trademark: "Droid is a trademark of Google and may be registered in certain jurisdictions." Licence: not settled (GAPS 6). Epic's record for the Droid fonts, UE 5.9 Preview 1: Engine/Content/Slate/Fonts/DroidSans.tps, leads, through a redirect in the release's optional Android platform files (not installed on the machine that made this file), to the record UE 5.9 Preview 1: Engine/Source/Runtime/Core/Private/Android/AndroidOpenSourceProject.tps ("Android Open Source Project"), which names the Apache License, Version 2.0, and Epic's licence file UE 5.9 Preview 1: Engine/Source/ThirdParty/Licenses/AndroidOpenSourceProject_License.txt. The font's own licence field holds a licence of Ascender Corporation instead. Noto Naskh Arabic UI and Noto Sans Thai: 1 font file each in Slate/Fonts Copyright: "Copyright 2013 Google Inc. All Rights Reserved." (Noto Naskh Arabic UI); "Copyright 2016 Google Inc. All Rights Reserved." (Noto Sans Thai) Trademark: "Noto is a trademark of Google Inc." Licence: SIL Open Font License, Version 1.1, as follows. Source of the text: UE 5.9 Preview 1: Engine/Source/ThirdParty/Licenses/Noto_License.txt, named by UE 5.9 Preview 1: Engine/Content/Slate/Fonts/Noto.tps. ------------------------------------------------------------------------------ This Font Software is licensed under the SIL Open Font License, Version 1.1. This license is copied below, and is also available with a FAQ at: http://scripts.sil.org/OFL ----------------------------------------------------------- SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007 ----------------------------------------------------------- PREAMBLE The goals of the Open Font License (OFL) are to stimulate worldwide development of collaborative font projects, to support the font creation efforts of academic and linguistic communities, and to provide a free and open framework in which fonts may be shared and improved in partnership with others. The OFL allows the licensed fonts to be used, studied, modified and redistributed freely as long as they are not sold by themselves. The fonts, including any derivative works, can be bundled, embedded, redistributed and/or sold with any software provided that any reserved names are not used by derivative works. The fonts and derivatives, however, cannot be released under any other type of license. The requirement for fonts to remain under this license does not apply to any document created using the fonts or their derivatives. DEFINITIONS "Font Software" refers to the set of files released by the Copyright Holder(s) under this license and clearly marked as such. This may include source files, build scripts and documentation. "Reserved Font Name" refers to any names specified as such after the copyright statement(s). "Original Version" refers to the collection of Font Software components as distributed by the Copyright Holder(s). "Modified Version" refers to any derivative made by adding to, deleting, or substituting -- in part or in whole -- any of the components of the Original Version, by changing formats or by porting the Font Software to a new environment. "Author" refers to any designer, engineer, programmer, technical writer or other person who contributed to the Font Software. PERMISSION & CONDITIONS Permission is hereby granted, free of charge, to any person obtaining a copy of the Font Software, to use, study, copy, merge, embed, modify, redistribute, and sell modified and unmodified copies of the Font Software, subject to the following conditions: 1) Neither the Font Software nor any of its individual components, in Original or Modified Versions, may be sold by itself. 2) Original or Modified Versions of the Font Software may be bundled, redistributed and/or sold with any software, provided that each copy contains the above copyright notice and this license. These can be included either as stand-alone text files, human-readable headers or in the appropriate machine-readable metadata fields within text or binary files as long as those fields can be easily viewed by the user. 3) No Modified Version of the Font Software may use the Reserved Font Name(s) unless explicit written permission is granted by the corresponding Copyright Holder. This restriction only applies to the primary font name as presented to the users. 4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font Software shall not be used to promote, endorse or advertise any Modified Version, except to acknowledge the contribution(s) of the Copyright Holder(s) and the Author(s) or with their explicit written permission. 5) The Font Software, modified or unmodified, in part or in whole, must be distributed entirely under this license, and must not be distributed under any other license. The requirement for fonts to remain under this license does not apply to any document created using the Font Software. TERMINATION This license becomes null and void if any of the above conditions are not met. DISCLAIMER THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM OTHER DEALINGS IN THE FONT SOFTWARE. ------------------------------------------------------------------------------ The two lookup tables of the glint shading: the textures /Engine/EngineMaterials/Substrate/GLints/AGlintTex2dArray and /Engine/EngineMaterials/Substrate/Glints2/AGlintTex2dArray2, which the engine's Substrate shading samples to draw glints From: "Real-Time Geometric Glint Anti-Aliasing with Normal Map Filtering" (2021). Epic's record, UE 5.9 Preview 1: Engine/Content/EngineMaterials/Substrate/GLints/real-time_geometric_glint.tps, says Epic converted the project's lookup table into an engine texture and adapted its shader code; the second table has no record of its own. Licence: MIT, in two forms. First the project's licence file as Epic ships it (without Epic's header): UE 5.9 Preview 1: Engine/Source/ThirdParty/Licenses/real-time_geometric_glint.LICENSE.txt. Then the notice as the engine's shader file carries it (lines 9-11, comment markers dropped): UE 5.9 Preview 1: Engine/Shaders/Private/Substrate/Glint/GlintThirdParty.ush. MIT License Copyright (c) 2021 ASTex-ICube Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. The MIT License Copyright (c) 2021 Xavier Chermain (ICUBE), Simon Lucas(ICUBE), Basile Sauvage (ICUBE), Jean-Michel Dishler (ICUBE) and Carsten Dachsbacher (KIT) Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. The lookup table of the sheen shading: the texture /Engine/EngineMaterials/LTC/Sheen_LTC, which the engine's cloth and fuzz shading samples From: Epic's record, UE 5.9 Preview 1: Engine/Source/Runtime/Renderer/Private/ltc-sheen.tps ("Sheen LTC Coeficients"), names the ltc-sheen project (github.com/tizian/ltc-sheen) as the source of the precomputed sheen tables in Engine/Source/Runtime/Renderer/Private/LTC.h; the texture holds the first of them (Sheen_LTC_Volume), exported by the engine's SystemTextures.cpp. Licence: Apache License, Version 2.0, as Epic's licence file for it says (UE 5.9 Preview 1: Engine/Source/ThirdParty/Licenses/ltc-sheen.LICENSE, which names no copyright holder); its text is in section 6. The two lookup tables of SMAA (subpixel morphological anti-aliasing): the textures /Engine/EngineMaterials/SMAAAreaTex and /Engine/EngineMaterials/SMAASearchTex, SMAA's precalculated area and search textures From: the SMAA project, whose shader code is listed in GAPS 7; its shader file names the two textures (UE 5.9 Preview 1: Engine/Shaders/Private/SMAA/SMAA.ush, lines 105-108). Copyright: Copyright (C) 2013 Jorge Jimenez, Jose I. Echevarria, Belen Masia, Fernando Navarro and Diego Gutierrez (the copyright lines of SMAA.ush, without their e-mail addresses) Licence: MIT, as SMAA.ush gives it, which says that the notice need not be included in binary distributions. ============================================================================== GAPS (not yet complete) ============================================================================== 1. Other third-party code in this game's web build. Engine/Platforms/Wasm/Docs/THIRD-PARTY.md lists only what the web platform adds. The symbol map of this game's Shipping web build of 2026-11-12 also names code from: Recast/Detour (navigation), LZ4, xxHash (XXH3), CityHash, nanosvg, msdfgen (Slate), Clipper2, RapidJSON, Eigen, SQLite, jpgd/jpge, stb_image_resize2, voro++ (fracture), the Animation Compression Library with Realtime Math (ACL, RTM), libsamplerate, and the Mutable plugin's block compression (Miro.cpp), which says it is based on BCDec (MIT), stb_dxt (MIT), ASTCRT (BSD-3-Clause) and astc_dec (Apache-2.0). Their licences (zlib, BSD-2-Clause, BSD-3-Clause, MIT, Boost, MPL-2.0, Apache-2.0, public domain) mostly ship with Unreal Engine (Engine/Source/ThirdParty/Licenses: Recastv1.4.2_License.txt, LZ4_License.txt, xxHash_License.txt, CityHash_License.txt, nanosvg_License.txt, msdfgen_License.txt, Clipper2_LICENSE.txt, RapidJSON_v1.1.0.LICENSE, Eigen_*.license, SQLite_v3.47.1.license, Animation Compression Library_V2.1.0.LICENSE, Realtime Math_v2.2.0.LICENSE, Libsamplerate_License.txt; the voro++ LICENSE in Engine/Source/Runtime/Experimental/ Voronoi/Private/voro++; the headers of stb_image_resize2.h and jpgd.cpp), but the versions were not matched to the engine's records and their texts are not in this file yet; no licence file for the code Miro.cpp is based on was found. Eigen (MPL-2.0) also asks that recipients be told where its source is. The same symbol map also names, with their texts not in this file yet either: the ACES 2 output transform code adapted from OpenColorIO 2.4.1 (BSD-3-Clause; Engine/Source/Runtime/Renderer/Private/PostProcess/ ACESUtils.cpp and Licenses/OpenColorIO_library_v2.4.1.license), FAAArrayQueue by Pedro Ramalhete and Andreia Correia (BSD-3-Clause; Engine/Source/Runtime/Core/Public/Experimental/Containers/FAAArrayQueue.h), PM-k by Robert van Engelen, Genivia Inc. (BSD-3-Clause; Engine/Source/Runtime/CoreUObject/Internal/UObject/ CoreRedirects/PM-k.h), Stan Melax's Sandbox (MIT; Engine/Source/Runtime/Engine/Private/Animation/ AnimPhysicsSolver.cpp), and the Animation Compression Library plugin by Nicholas Frechette (MIT; Licenses/ Animation Compression Library Plugin_v2.1.0.LICENSE), whose two settings assets are in the game's data files. 2. FreeType's BDF and PCF drivers are linked. Their own licences are in FreeType's src/bdf/README and src/pcf/README, which the Launcher release of Unreal Engine 5.9 Preview 1 does not include (it has FreeType's headers and libraries only). The fthash text in section 2 is from the same BDF code but is not those files. 3. FreeType's gzip module is linked. Whether it uses the engine's zlib or FreeType's own copy of zlib was not checked; both are under the zlib licence (section 7). 4. The two Unreal Engine lines in section 1 follow the 2022 EULA text; the current EULA page was not available to check them against. 5. Epic's third-party records for the web platform are marked as waiting for Epic's third-party review, so this list may change with UE 5.9 final. 6. Droid Sans Mono (section 12): its licence is not settled. Epic's records for the Droid fonts lead to the Android Open Source Project (Apache License 2.0), but the licence field of the font file itself holds a licence text of Ascender Corporation (http://ascendercorp.com/eula10.html), which is not an open-source licence. 7. Third-party code compiled into the game's shaders (its shader archives of 2026-11-12), with their texts not in this file yet: the Academy Color Encoding System (ACES) tone mapping and output transforms, whose licence asks that binary distributions carry its notice, conditions and disclaimer in their documentation (Licenses/ACES_v1.3_LICENSE.txt and "Academy Color Encoding System Core Transforms_v2.0.license"); Michal Drobot's ShaderFastLibs (MIT; Engine/Shaders/Private/FastMathThirdParty.ush); the screen-space shadows of Sony Interactive Entertainment's Bend Studio (Apache License 2.0, "Copyright 2023 Sony Interactive Entertainment"; Engine/Shaders/Private/bend_sss_gpu.ush); and SMAA by Jorge Jimenez, Jose I. Echevarria, Belen Masia, Fernando Navarro and Diego Gutierrez (MIT; Engine/Shaders/Private/SMAA/SMAA.ush, which says the notice need not be included in binary distributions). 8. Three blue-noise lookup textures in the game's data files, /Engine/EngineMaterials/FastBlueNoise_scalar_128x128x64, FastBlueNoise_scalar_128x128x8 and FastBlueNoise_vec2_128x128x64, have no Epic third-party record. Engine/Shaders/Private/BlueNoise.ush says the scalar texture is based on "Spatiotemporal Blue Noise Masks" (Wolfe et al. 2022) and NVIDIA's work on spatiotemporal blue noise, and the first texture's import data names a file in a folder called SpatiotemporalBlueNoiseSDK-main. Their source and licence were not established.