Formats like .abc (Alembic) and .fbx (Filmbox) handle complex animations and rigs through distinct structural approaches tailored to their use cases.
- **Alembic (.abc)** stores baked animation data by capturing vertex positions frame by frame, preserving complex motion without relying on original rigs. This makes it ideal for final animation delivery, archiving, or rendering, as it focuses on motion preservation over rig editability.
- **FBX (.fbx)** retains rig hierarchies, bone weights, and animation curves, enabling rig reuse and editing across 3D software. It prioritizes rig integrity, supporting collaborative workflows where cross-software rig manipulation is needed.
In summary, .abc excels at delivering/rendering final animations, while .fbx is preferred for projects requiring rig preservation and cross-software editing.