Things to drive a painter batty: changing light conditions (one day rainy/snowy, one day sunny). Having your flowers rearranged by the cat, who sneaks drinks of water from the vase. Tulips that change color. Yes. These were pale pink when I bought them. And trying to make complex blanket patterns appear to lie flat, receding into space. OY! I had to go outside and rake leaves to clear my head. But there were little treasures to discover among the leaves: species tulips!