This is an illustration from a new geology textbook I'm co-authoring and illustrating for McGraw-Hill. it's an example of how simple environmental elements can influence the weathering of a landscape - a small landscape in this case. This piece was done in about 5 hours - since deadlines are so rushed to finish some 2000 illustrations total, I've learned a lot of shortcuts - especially as I near the end of the book. The object was started in zBrush, and was booleaned out of a block in Lightwave, textured and rendered and then quickly painted over in Photoshop to make it look less like it was computer generated.