Hey, great question! (And nice sculpt) Lumpiness is something every digital sculptor learns to get over. I’d suggest two things:
- Try using the Flatten/Contrast and Scrape/Peaks brushes as well. They’re pretty versatile when you get into the settings. This exercise will show you how to tweak them: https://cgcookie.com/exercise/exercise-rocky-formations
- Start working with big shapes with as few triangles as possible and then work your way down to smaller details. Even with Dynamic Topology, only use the amount of geometry needed to create the next level of refinement for your desired shape. Get the larger form down first before adding any details. This is just a workflow thing, and it will inherently prevent you from getting bad lumps. Some may still come up after adding detail, but those should be easy to fix with smooth, flatten, or scrape.
