I love microcosm it is very versatile but it does take a lot of work to get it dressed up and morphed into place. Its kinda like having another character to set up. I dont want to discourage anyone from getting it, but it isnt just a drop in place and render. Ascinct, I would suggest going to RNDA, in the free section is a skydome and some textures. Its not a complete solution, but it is a good tool and it is free.

My Homepage - Free stuff and Galleries