To explain a little about my dreams... Usually, I dream in one of two types.
Story mode-> This type of dream is where the background is rather bland and everything is more focused on what is happening around the main character. This type of dream happens less often, and is usually short.
Movie mode-> This type of dream is where not only is there a complicated storyline but there are also a lot of backgrounds. Usually the backgrounds are very grandiose or imposing, the dreams last longer as more time is spent at discovering. There is usually music that comes along those dreams.
If you look at the picture above (the Dream Planet) this is a background from a dream I had. it looks like Mars, but I assure you, it's not. I didn't quite capture it, seeing my incapability with 3D programs, as well as the general sucky-ness of Bryce. The landscape shouldn't be only red, but mix in shades of orange and brown as well. It's not mounds of twisted metal, but trees, with wind-chimes hanging from them, and the mist is lower. In the distance should stand a tower. But anyway, it gives a general idea. I think the only thing I made properly are the planets in the background (sky). For most of my dreams, I will try to "capture" the most imposing picture I remember. But keep in mind I suck at it :) Also, some dream pictures are already under the Alien City, for I often dream of those places. Well, that's it. Enjoy.