I made simple 48-edged cylinder in Blender for baking and triangulate it manually, but after uploading in Sketchfab Viewer, I’ve noticed that it looks more angular than it actually was. It turned out that every second vertex now does not affect the silhouette, but is simply located on a straight line between two other vertices.
I’ve done some tests: topology editing, fbx/obj/dae, max/blender, opera/chrome/android app, but at the moment the only stable setting for me is changing the “cap” topology.
Blender (Max/Substance/Marmoset/Windows 3D Viewer - same results) scene screenshots:
Sketchfab scene screenshots:
By the way, if download model from Sketchfab and loadup in Blender it will looks normal as it was originally.
Really wondering what can lead to such a result. Hope I didn’t broke anything, and this is not a problem on my side)