[cbk1994]

I know this will make me sound stupid, but ...

When redraw() is called, or however it works, it goes through each pixel, correct?

If you could make an area that it doesn't set it, even an array of certain pixels (for example, at 300, 400 don't show the effect) then just have it not draw there.

Would not something like this work, and then just have a function to get all the pixels in a circle or box?