Watercolor on board. I got this board sent to me as a sample. The idea of painting on a special watercolor board appealed to me, to have a solid surface to work on, no paper that might ripple. It was also nice to work on. Still somehow I never repeated the experiment, the board being hard to get and there being only one supplier. Travelling through the harsh desert climate these travellers happen upon a massive tree like organism that seems to defy the elements thrown at it.
This one is sold.