Here a sort of workaround: making the neg plugin just not invert pixels whose alpha is less than 0.5. That still produces some whitish frame around icons which have a little antialias alpha border for smoothing them, but the result is way better than what I manage to work out otherwise.
Here a sort of workaround: making the neg plugin just not invert pixels whose alpha is less than 0.5. That still produces some whitish frame around icons which have a little antialias alpha border for smoothing them, but the result is way better than what I manage to work out otherwise.