im trying to model a half cut cylinder with an axial cut section. The Cylinder has a subsurf modifier. As long as the cylinder is cylindrical, it is perfectly round (Type A). If i remove the half of the cylinder using a boolean operation, it stays round (B). But if i remove the verts in edit mode, the shape is no longer round (C ):
Using the Boolean Modifier alone is not a solution as the model should be low poly and be exported into another application.
Thank you for help!