P.S. I meant only blur the alpha channel. And probably don't use a normal blur. Just search for pixels with alpha == 0, and if they have 2 opaque neighbours (alpha = 255), then change the alpha from 0 to 128.
P.S. I meant only blur the alpha channel. And probably don't use a normal blur. Just search for pixels with alpha == 0, and if they have 2 opaque neighbours (alpha = 255), then change the alpha from 0 to 128.