@EarthQuake Fails too in 4.01 Are your team planning on solving this bug one day ? I'm also having a "single vertex with incorrect skinweights" issue (seems it goes back to the root). Maya, 3dsmax, blender, akeytsu, FBX review, sketchfab, unreal....all of them does not have the issue. Happens since 3.04 (that's why I'm…