Thought i'd share my take on chapter 5 from the workbook, Snow Queen.
Model photo is the stock image provided in the chapter. Graffiti photo is my own, not sure who sprayed it (local skate park and fully allowed area) but it seems to wrap around the model really well and there is a crack/chip in the surface of the wall which lines up with the hair line of the model so well. I did this version on my iMac but have also repeated the same process on the iPad version of Photo. I did try a full black and white version, but didn't think it suited the image.
Attached for those who are interested is very low res version of the graffiti shot used, If anyone wants the full res version to play around with just ask and i'll upload it.