I am trying to extrude a small section of a hemisphere into a flat surface (like the depressions in a Mancala board....or the death star main gun). Correspondingly, I want to extrude a matching section outward in different flat surface to fit into that depression.
I have been scouring the web for tutorials, but not much has come up with adequate explanation for someone just beginning. What is the correct/best way to do this? I have seen some people make small extrusions, then scaling, then extruding, and scaling again (Repeatedly), but this seems a little....like a hack rather than a proper method to do what I'm looking to do.
Any help would be appreciated!