Skinning

Skinning deforms meshes by blending vertex positions with weighted joint (bone) transforms.

How it works

• Each vertex stores joint indices and weights (typically 4 influences).
• The skinned position is a weighted sum of joint matrices applied to the bind pose.
• Bind matrices and joint hierarchy must be preserved for correct deformation.

Interoperability notes

• Max influences per vertex and weight precision vary by engine.
• Non-uniform scaling on joints produces shearing; prefer uniform scale.
• Ensure tangent space is recomputed post-skinning when needed.