I am new to studio photography, and I am interested in doing portrait photography using different types of backgrounds. I have been searching the web for background systems from companies like Amvona.com and other sites, but I also ran across a site that offers a Virtual background system by VB. I would be interested to learn from anyone who has had experience with such a system, and is it worth the investment? The company?s web site does not list the price of any of their systems. I do have a Nikon N90, Nikon Coolpix 995, and a Hasselblad 503 CW, I would also like to know if one system will be compatible with all three cameras. Thanking you in advance for your help.