FBX

FBX, a 3D exchange format by Autodesk, is widely used in games, animation, and VFX. It stores meshes, skeletal bindings, animation curves, and material references. Transfers between Maya, 3ds Max, Unity, and Unreal almost always use FBX as the intermediate format.

FBX's main weakness is texture handling: it references external files rather than embedding them, so models may lose materials after moving folders or packaging. To fix, re-export with the embed textures option, or convert to a container format. Also, FBX is proprietary and version-specific; newer software exports may fail in older tools. For web delivery, keep a GLB or OBJ as a neutral copy.