my.overlay = off; // gets rid of transparency by black pixels
Either that, or change all areas exactly black to the darkest blue possible, 0, 0, 1, the closest possible to black without actually being black (0, 0, 8 for a 16-bit texture).
"You level up the fastest and easiest if you do things at your own level and no higher or lower" - useful tip
My 2D game - release on Jun 13th; My tutorials