If you don't know Substance Designer it is a great tool for generating textures: http://www.allegorithmic.com/?PAGE=PRODUCTS.designer
I cleared sharing this promo on the forum with the people at Allegorithmic (it was originally emailed to me) -- here's the details:
Substance Designer is having a promotional sale until February 27th 2011 for a 50% discount (395€)
First you will need to obtain the evaluation version of Designer (http://www.allegorithmic.com/?PAGE=PRODUCTS.evaluation) as they can only provide the discount to people who have an account on thier support site. People interested in the discount should put the code “GETMORESUBSTANCE” in the “Comments” section of the evaluation request form.
Best,
Jason.
That must have been very hard to build in Sketchup.
great stuff, excellent use of Sketchup's native rendering as well.




I like Corel Painter for painting, drawing, and inking... It's used very heavily in concept art for those things and I've used it for comics as well.