Ok, so I just got a new (HOLY CRAP) 40" x 30" canvas. That's 40 by 30 square inches of white squared canvas :O. I began painting on it and I'm approximately 1/3 done. My problem is...how the hell do you scan it? I have a good enough camera to take a picture of it but I would like to preserve the quality of the painting as well as possible. Someone help me plz :(