I have a problem with an uploaded model. It is allright in 3dsMax and the smoothing groups are alright in 3dsMax in the viewport and rendered. But the uploaded model in Sketchfab appears partly smooth and partly faceted.
Here is the model:
What could be the reason and how can I fix it ?
I don´t know why, but i reimportet the relevant meshes from an older file in 3dsMax and then the export worked fine for Sketchfab. Somehow I messed up the vertex normals.