I stayed up rather late a few nights ago just going through some ideas. I came up with a theme and did a few quick 3D compositions based on it, exploring surrealistic, science fiction and fantasy imagery, atmosphere and mood, all in a somewhat minimalistic, sketchy way. The following gallery posts titled "Welkin" are what came out of it.

This is the second quick comp based on the "Welkin" theme.
Here is the first :

http://forums.cgsociety.org/showthread.php?f=132&t=619954

All textures are procedural.
3dsmax, Photoshop.