Rig Scale can correct a mismatch between an animation’s units and Roblox studs or apply a direct scale factor. Rest Pose Source is no longer locked to the first frame of the first track: creators can choose another track, use the imported rig, or use that rig with all bone rotations zeroed.

Rig Type explicitly marks an import as R15 or Custom. R15 connects to Roblox systems such as humanoids and emotes, while Custom is intended for non-humanoid characters. Track Selection imports only the chosen animation track from a multi-track file.