Hi,

I would like to experiment with some nice backgrounds. I've seen several tools available

Nerd's Backdrop Tool
MicroCosm
Millennium Environment
Multiplane Cyclorama
Worldbase-Xtreme-Kit

I'm looking for something that

1. Is easy to use and has good documentation
2. Can use any reasonable background picture and doesn't require specially prepred pictures
    
   Any suggestions?

Thanks!

Helmer