Subdivision surfaces practice. This is one of the tools I struggle with a lot, conceptually. Fundamentally, I think I understand how this works and I’ve done similar actions in other programs that require more effort to do this same function. Looking at a primitive and trying to figure out how to divide it so I can move/extrude/bevel or whatever to get the result I want takes me a lot of mental power. I might come back to this later today and see if I can’t make a simple door or window with it.
