This is what I was doing down at the park the other day. Have you ever walked up to a tree and got really really close up? These were taken from about 12 inches, and then I photo shopped in various ways to enhance the natural colors. You can commission one or more as metal prints or giclee. I enjoy looking for people, faces and images in bark. The top three are people and the bottom one is water.
These were taken with a simple camera on my iPad. Enhancements within the Camera app.