How can you be artistic with mud?

The Basic Idea

Use masking tape to create a shape or pattern on the fabric/paper. Flick mud all over it. When dry, remove the tape to see what pattern or shape is left.

How to take it even further or make it more challenging

Can you create a given shape or picture? What happens if you put more tape on during the painting? Try working on a larger or smaller scale. What natural materials could you use instead of tape to create shapes/patterns?