Rocks are quite difficult to paint. I'm not sure why. Perhaps its because of the texture or maybe its difficult to capture their shapes accurately, or maybe because I find the colors a bit boring. I don't know what my real problem was/is. I'm not happy with these, there's nothing wrong, but it just seemed difficult and I don't know how to fix it. I like the compostition though, the rocks fit well together and that part was fun. These are some of the rocks that we've gathered in our travels because they were odd and different. It's not often that you find a rock that is almost perfectly round, or one that looks like a pertrified dinosaur vertebrae.