I use several programs... Poser, Hexagon, ZBrush and Maxwell for textures and rendering. Like the email I just sent out, the last one of the Smithsonian Museum, it took me about 9 days to get it to the stage that you guys got to see. After modeling, making new items, staging, test renders, remodeling, re-staging and more renders to test... it was finally complete. Some of the renders take an hour to see how the lighting works, some only take a few moments to see that it didn't work well.
Thank you guys again for the kind words.
-kmer