I'm trying to set up deferred lighting in XNA 4. I need to render to 3 multiple render targets. No matter what I do the render target designated as COLOR2 in my pixel shader , the third render target, never renders correctly. I have also loaded tried and tested deferred lighting tutorials and I get the same results....the third RT never renders correctly.
1. XNA 4 hidef is supposed to support 4 MRT's. Is this a limitation of my graphics card?
2. How do I determine the max number of supported MRT's on my target system?