Logarithmic depth with skinned model rendered incorrectly

[bagnell]

Playground link

Current result:

Expected result:

[bagnell]

I noticed a similar issue with the Monster.glb model from the glTF-Sample-Models repo. The front right leg will show through the back right when looking from the left side. All the other sample models look right.

[deltakosh]

Hello this seems to come from a vertex weight normalization issue. The total weights applied on a vertex is not equal to 1 hence producing wrong world matrices in shaders

[deltakosh]

Here is the current discussion at Khronos:
KhronosGroup/glTF#1213

[deltakosh]

To fix it in your code you can call mesh.cleanMatrixWeights() on all your meshes
https://github.com/BabylonJS/Babylon.js/blob/master/src/Mesh/babylon.mesh.ts#L1461