When several brushes lie on the same surface, I get a smooth surface where I can't tell one brush from the other. But when when some of those brushes are actually patch caps, I get some very visible borders. The shadings just don't look right.
For example, I have a circular hole in a floor. The brushes create a square hole, and the patch caps "round out the corners". But the patch caps are very visible. WHat should have been a circular hole in the floor is instead a square plate with a circular hole in it.
Is there a way to fix this so the transitions are smooth and non-obvious?