I'm running into a problem when I import images as sprite animation frames. I use an art program called Pencil (http://www.pencil-animation.org/) for drawing my sprites, which automatically applies an anti-alias effect. When I imported them into Construct I set "pure white" as the transparency, and selected/deleted all dead space around my sprite, but where it's anti-aliased there is a thin, jaggy "almost white" border going 97% of the way around my sprite.
So my question is, is there an easier way to solve this problem other than going back to the original art files and going around the edges pixel by pixel, deleting the "almost white" border? I tried going back into Pencil and filling the space around the sprite with a vivid blue, which DID get rid of the almost white border, but then when I imported back to Construct I couldn't figure out how to set that *exact* shade of blue as the color mask.
I guess I could always go into the Pencil options and turn off anti-alias, but that would require re-drawing all the sprites I've done so far, not to mention, they look a whole lot better with the anti-alias. Any help anyone could offer would be greatly appreciated.