Autodesk FBX SDK 2020.2 /Engine/Source/ThirdParty/FBX We use it to import fbx file. The fbx file is what we use to import meshes and animation into the editor. This sdk is not use at runtime. https://damassets.autodesk.net/content/dam/autodesk/www/adn/fbx/2020-0/About_FBX_SDK_2020.0.pdf Licensees Git P4 /Engine/Source/ThirdParty/Licenses