I went again to a local Encaustic art course. Encaustic art means painting with beewax, with special paints and special small vechicles. We used certain kind of special iron to warm the wax-paints.
It felt relaxing to use something else than pencil. Almost anything can happen and painting can be very fast. Finally the painting should be polished and that makes it more three-dimensionl still.
This time I tried to paint also on bare wood. Wood absorbed color to some extent but the result was pretty interesting. These small paintings are painted on special paper, though.