I am going to have to lock this topic. Sorry but this is not what i had intended to post. Wrong link. I just remembered, silly me. ;D
Oh, he's been using VistaPro! Just kidding!
The geology is interesting. I've seen it hundreds of times. I hate the colors. Why? They are stuck in my head. When I start doing a color choice for my landscapes, these images come in. As a result, I've done tons of red/pink rock surfaces.
It's a good find, even I want to make cool arches and caves. Hmmm... Maybe I can tune my monitor to black and white/greyscale?