O.K. I learned this technique from a book by Matt Klaskowsi, "Layers". It's really a very involved technique consisting of 17 steps, on 10 pages of the book. The chapter was called A DEEPER LOOK INTO LAYER MASKS. You're correct. I had an image of a TV set, and a train, and then some weird manipulation.Okay, now this is interesting. I moved this post over to the Photoshop forum because I wanted to ask you about the image you uploaded. This is very cool. Would you mind explaining your process in Photoshop, in case anyone who visits this is curious about it? I'm assuming you had an image of a TV and another one of a train and then did some selections and cropping. It looks great. Did you employ any secret tricks you'd like to share?