Thank you very much, Eric!
I've updated my signature.
I am a newbie and just trying to do as much research as I can to figure this out. I have not been able to find this particular issue where it greys out during walkthrough only. It works fine in standard camera mode.
I am thinking...I may have accidently unchecked or checked some setting that may have caused it or perhaps it is the video card? It worked previously but isn't working now. Any thoughts?