Here's an issue I've been pondering: I cut window holes in two different kinds of walls using boolean. The wall in example A has been divided so that every window has its own polygon. This gives nice looking topology. In example B six windows are cut off of one continuous wall. This gives messy topology but fever faces.…
I'm not an expert but I'll try and help. :P In many buildings, including this one, there is a lot of repeating geometry. So what you need to do is take advantage of it. So model every style of windows and duplicate them a according to your reference image. I don't think I explained that too well so maybe someone else can…