My sister and her family invited us over today. I snapped a few shots of all the kids and somewhere along I got this idea of creating a montage. I placed beautiful Tilda against a white wall knowing that I would mask her out in post processing. I have a few grungy textures and I decided on one of them for this image.
This is what the original looked like:

Post processing
I basically created a mask using the pen tool. Inserted the texture for a background. Used a lot of burning and desaturated the girl to match the background. I had to manually tone down selected parts on the girl to make her look "believable" in this setting. Obviously I created a drop shadow and skewed it a little. She´s cool and she deserved a cool image!