Here is a tutorial about how to change a background, its pretty easy and useful
It would be awesome a pictures of you and something beutiful behind of you, like
a beach or Paris or a place that you like
Anyway, lets start!
1. we will need two layers, in one layer we need the Background and to other
Layer we will need a photo of a person
2. now go to Channels and select the Blue 'cause its the most
darkest of other colors(red and green)
3. now Right Click on the blue and select Duplicate Channel
and it will appear a copy of Blue
4. now go Image > Apply Image
and now go to Blending and choose Color Burn and press ok
5. now go to Image > Adjustments > Curves
it will apperar a new box
and now we have to make black-darker and white-lighter
and then click ok
6. now take the Pen Tool
end select ONLY the face of the girl! do not touch her hair!!!
7.now press Right Click > Make Selection > OK
Now take the Brush Tool and make sure your color is Black
and draw her face with black!
8. go to channels and select these:
and then press Ctrl and Click on Blue Copy
and the photo will become like this:
9. now go to Layers then make sure you got both eyes on and then press
Add Layer Mask
and it will become like this:
10 now you will see that her hair is "white" in corners from the lights,
now we have to fix it...
Open a new layer, the new layer must be between the Background and the woman's photo
now select the Eyedropper and take a color of her hair
and now choose the Brush Tool and then, draw her hair's corners
and play with Opacity
WE ARE DONE!!
VIDEO:
http://www.youtube.com/watch?v=RendIMXyAAg
it took me 8h to upload it!!!
Credits: to me