I made some paint last weekend with clay soil from the front yard. I was planting a comfrey plant from a friend and found some soil that was sort of clay-like so I brought it inside, strained the big chuncks through a sifter and then mixed it with acrylic matte medium. I really like the texture and the color. I will blend it better next time with a mortar and pestle I think but this was really cool to make. I used some of the brown on the Cernnunos painting actually. I have gotten this far making him and just have to finish some details tonight if I get a chance.