I press "PrtScn" button to save a screenshot as I always do but when I paste it in Photoshop, all I see is black color. What gives?
It's due to the hardware accelerated graphics. You may be able to get around this by windowing the game and repeating the process. I'd suggest though, that you get a program such as FRAPS, which will allow you to hit a hotkey and instantly save out a still image to a folder. Link