I tried to “cut” a cylinder shape out of a mesh via the Boolean modifier.
This worked fine, the shape was realy cut out well, but when I used smooth on the mesh, I got the dark area’s around the edge where it was cut.
I noticed that there were some triangles at those areas and tried to remove them (alt-J) but that didnt solve it. I also did <ctrl-n> for recalculating the normals but that didn’t do it either.
What can I do to get rid of these dark area’s. Is there another option to get rid of the triangles automatically or do I have to add edge loops manually?
Or maybe there’s another way to cut the cylinder out of this mesh?