Bevel + Subsurf + Edge Crease = jagged edges
Open, ConfirmedPublic

Description

I've noticed a strange artifact that happens under three conditions:

  1. All the edges of a mesh have at least minimum Edge Crease to them.
  2. There's a Bevel modifier with non-zero width (it has to actually modify the geometry)
  3. There's a Subsurf modifier (Catmull-Clark, at least 1 Subdivision) after the Bevel

The artifact seems to appear on certain border edges, it can be removed by setting the Edge Crease to 0 for that particular edge:

Here all edges have full Edge Crease:

Here the problematic edges have Edge Crease of zero:

I attach a test .blend file:

Details

Type
Bug
mathieu menuet (bliblubli) triaged this task as "Confirmed" priority.Jan 7 2017, 4:50 PM

Can confirm the behavior. Really looks like a bug indeed. It only happens when the bevel modifier is activated, so I'll let @Howard Trickey (howardt) decide.