> My favorite method is to use a single zero-length line to make a circle > that perfectly fills the clearance.
Perfectly? Or slightly larger? I saw one board that used this technique, and at certain zoom factors you could see the hint of an outline where the drawn circle didn't quite fill the hole. > (you can even leave out one of the arcs for ultra-tight spaces). We need a way to edit the arc angles with the GUI. PCB has no problems with non-quadrant arcs, you just can't create them with the mouse. > The major down-side to this technique is that if you adjust the via > clearance you also need to adjust the thickness of the "solid > thermal". What we really need is a flag for pins/vias that means "dont' clear". I thought about a board-global "vias don't clear polys" flag but that messes up wave soldering, I'm not sure how useful it would be relative to pin/via-specific flags.
