MudBun is a real-time volumetric VFX mesh tool. It procedurally generates meshes from non-destructive "brushes" that define shapes, distortion, and surface modification. MudBun is intended for localized VFX, but it can also be used for volumetric modeling and provides a convenient auto-rigging feature. Locked meshes, including auto-rigged ones, can be exported using Unity's official FBX exporter package.