The stars one really looks best zoomed in (the thumbnail looks kinda lame), but I like them both!
Click to enlarge
All 100% pixel-shader generated. Both of these use pure improved perlin noise modifications to generate their look...no custom patterns like the brick and tile textures from earlier.
If you want to play around with the generator, the binary, code, and shaders are in a zip in the previous post. Have at it and let me know if you make anything awesome!
(Considered writing some article(s) on the topic? [grin])