Well here is one I started in September. It's all experimental. I laid canvas on table put just water on it, then thinned down acrylic paint, then dabbed off some with a paper towel. did this 1 or 2 times more. Then i put the purplish color at bottom really thinned down and let it drip down, did this another time. Then later same for a reddish color at top. So it looks like the drippings of cave walls. NOW the inside of the cave looks kind of greenish, but I started noticing images inside. Images that were not drawn, or painted or even thought of, they just showed up by accident. Thinking of what to do to finish this. Probably just darken the stalags on top and bottom and letting the inside be just as it is, a mystery. Any thots on finishing??