I can fix it by adding glColor4f(1, 1, 1, 1); before my gl calls in execute. I assume that it will multiply the texture color by 1 so won’t alter any color values. does that sound right?
Ya that makes perfect sense. If you don’t set the color you will use whatever color Touch has last used, which could be anything. Seems like another thing I should setup before the execute so I’ll add that.