Number 1 would probably be caused due to over writing your current mask with a new one. If you want to apply a effect for only your brick layer, then I would recommend creating a empty group, drag and drop your brick layer with its current mask into that empty group, then create a mask on the group and transfer your brick…
I've had a post sitting on the Allegorithmic page, people are reading it but not responding so I maybe this forum can help. I'm trying to figure out how to make this optimal for import into Unity. So I'll try summarizing the issues I still haven't figured out. -------------- I have been working a metal/wood shack. My first…