The topic question is the main question I have. The second main question is, how do you eliminate all smoothing groups without hunting down every single brush face? I tried to keep a written log of my smoothing groups this time but didn't keep up with it. I'm hoping there's a simple way to do this I have overlooked. I tend to avoid smoothing groups because beyond their basic function there are a few things I can't find the answers to. Do things in separate areas need to be in separate smoothing groups? From my experience I think this is true. It seems like the game is trying to apply smooth shadows across different areas and they get messed up. Or maybe the brushes are just unsmoothable. It just seems like some times it doesn't matter if they're in their own group. Sometimes it does. Though I try to keep them in separate groups (but it feels like a superstitious gesture).