So I decided to do some funky stuff for tests, I made a terrain in Bryce, saved it as a .tif file then added it to a cloud structure. Can get some neat effects, its a bit noisy but I think but tried various settings of samples etc on all levels and its still a bit noisy, but I'll upload the file if ya want. And BTW dunno what the hell is that banding and "mirroring" on the bottom. still learning:-)