Originally posted by Fire Angel The digital backgrounds idea is cool too, but if you want actual physical backgrounds I've found some good ones cheap in department stores that sell furnishing fabric; take a look at their end-of-line bins or go in when a new season starts and you can often get last season's fabrics cheaply. I guess places that sell dressmaking fabrics are another good source though they often don't come in such large widths, so you could end up needing to make joins if you buy those.
Yes, I have done that for a black satin backdrop to use for portraiture. You can also cruise Goodwill or similar thrift shops for bedding, drapes, and sometimes find a germ, uh, I mean a gem.