A free Photoshop tutorial from the worlds best Adobe trainers!
Channel masks are a great way to select some of the more impossible selections. Like grass & hair.
Note: In this case it’s the blue channel.
Note: The goal now is to get a good contrast between black & white around the edges of your object. To do this we can use a couple of options. Levels, the Paint Brush and the Quick selection tool can be handy.
Play with the levels until you get a good contrast. You will have to experiment as every image will be different.
Note: Now we can use the Brush Tool to paint in some of the white parts of the tree that aren’t meant to be white.
Note: If you leave these white areas in the middle of the tree trunk they will become holes in the mask. Make sure the trunk is completely black as per the screen shot below.
Your background is now selected.
Note: That’s it for our ‘My Temporary Mask’ channel. It’s of no more use.
You can’t add a mask to a layer named ‘Background’ because they are locked by default (a photoshop’ism!)
Note: This will give you your mask.
Note: When working with your mask in Photoshop ensure you have the mask selected in your layers panel and not the image itself. The mask will have a small white frame around it.
Once you have applied a mask to a layer you can adjust the edges.
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