Every time one changes the mask it seems to dilate. This may be due to Potrace, but I think it may have more to do with how the mask is drawn onto the canvas. Perhaps the outline is being drawn with a line thicker than 1 pixel, or perhaps only the inside of the polygon should be painted.
Every time one changes the mask it seems to dilate. This may be due to Potrace, but I think it may have more to do with how the mask is drawn onto the canvas. Perhaps the outline is being drawn with a line thicker than 1 pixel, or perhaps only the inside of the polygon should be painted.