Three Masking Techniques

Composition #1 

In this part I just took a picture of a mouse and a shelf, I added the mouse to the shelf. First I took the mouse picture and use the quick selection tool and then I dragged the layer of the mouse only to the shelf picture and it pasted by it self. 

Composition #2 

In this one, I took the picture of the shelf and a picture of a computer.

I used the computer as a background the self was on top. I used the brush tool and a mask to clear the background which was the computer.

Composition #3

In this one I took a picture of the computer and used a gray background and I duplicated the computer picture like the dancer one. I took the computer picture and used the quick selection tool that helped me pick an specific part of the computer that I wanted.