.fbx File — Autodesk FBX

FBX (Filmbox) is a proprietary 3D file format owned by Autodesk, serving as one of the most widely used interchange formats for 3D content between digital content creation tools. FBX supports a comprehensive feature set including polygon meshes, NURBS surfaces, skeletal animation with bone hierarchies and skinning weights, morph targets (blend shapes), cameras, lights, materials, textures, and complete scene hierarchy. The format comes in both binary and ASCII variants, with binary being the default for its smaller file size. FBX is the primary interchange format for game development pipelines — Unity, Unreal Engine, and most game engines support FBX import for characters, environments, and animations. The format is also standard in visual effects, architectural visualization, and product design workflows. Autodesk provides the FBX SDK for reading and writing FBX files, which is used by most third-party tools that support the format. While FBX's proprietary nature has motivated the development of open alternatives like glTF, its comprehensive animation support and entrenched position in production pipelines ensure its continued dominance in game and film asset exchange.