Over 4 years later and I'm Googling this issue. I found a solution to straight edges (if using Maya make sure the chamfer option on the bevel tool is turned OFF), but angled edges are horrible. How is it that you all have not fixed this yet? I'm scratching my head at how much is missing in this app (can't make a selection = ridiculous!). To be real here, if Mari were the same price as Sub Painter, I think we'd see a major shift. If you can't fix an issue like this.....?