Hello. Seems that old sample files made by Kuju, are the only one work correctly with skinned geometry. Here's a man made from a sample file directly using a 3D Max 2009 and Kuju's SkinDiffuse.fx with all settings left as default: And this one was made from the same file, but in 3DMAx 2015, and I've replaced original material (now missing) with a new one, but this one is RWMaterial SkinDiffuse.fx . And I think, reason is somewhere in exporter's settings, as RWMaterials has no this important section! Is there any correct way to do skinned meshes using RWMaterials ? Thanks.