@rspierenburg said:
I believe the solution to this problem is to subdivide that circular face into several smaller faces. That should help.
Rob
Rob, you're 100% right.
Face subdividing, resolve this issue but is very uncomfortable.
I thought (was hoping), that is simpler method for this.
After dividing, object can be hard to modify (I don't mean this particular case but more complicated).
Anyway thanks for Your reply.
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Regards
Marcel