For the last three weeks or so, I have been beta testing an iPad app called Edru. This app recreates the traditional art of marbling that is normally done with paint. I have created a few images, and then combined them with my own background and shading techniques. Here are some of them.
If you are interested in the Edru app, scroll down to the bottom of this post for a video.
This is a short demo of the Edru app.