Alright, so Ive had this happen many a time before and I cannot figure out why its happening for the life of me. Ill be working on a photo, making multiple layers (background copys) for the eyes, skin, lips, etc etc etc. Sometimes out of nowhere, or maybe from a certain thing Im doing that I shouldnt, Ill make another background copy layer and nothing will work. For instance, I was just working in a photo of my girlfriend and had 5 layers done already (all background copies) Then I make another copy, and am about to start her skin and nothing seems to work. I quickly select the brush tool just to see if Im imagining things, and Im not, not even the brush seems to be putting anything on the actual picture. HOWEVER, in the ICON of the picture in the layers pallete when I brushed a few black strokes, even though they didnt come up on the large photo, I could see something beeing done on the small icon picture. Whats going on here??