For a couple of days I’ve been trying to find out how one can punch a hole (or make extrusion) of a rectangular shape, with straight (or almost stright) edges, in a curved, subsurfed surface.
For example, see attached screenshot. How I should approach making a rectangular extrusion in a subsurfed sphere? When I try adding additional loops or bevels, the curvature of the sphere gets distracted.
Looking forward to your help,