Fill tool not respecting the boundaries of my face selection mask I'm trying to fill selected faces with color using the fill tool with face select mask toggled, but in the UV editor you can see that the fill is extending beyond the edges by quite a bit. I'm using Zero Brush here, but it happens in default Blender, too (ZB actually has a "fill threshold" option that lessens this problem but does not eliminate it.) Is there a way to stop the edges from bleeding over, period? 



Edit: If the image is hard to see, full size is here overfill
This is done on purpose to make sure that those UVs are completely covered.

If you want to turn it off, set the Bleed to 0 in 3D view > Tool shelf > options:



However this may cause artifacts like this, where the pixels don't completely cover the entirely UV face: