Bair Art Edition's Tutorial on:
Adjusting Color & Exposure
In Adobe Photoshop
Separating With New Layers
So far, we've only used masks to separate, here is a way to extend that technique, and easily see the edges.
We will be making a new layer from a quick and crude selection, and then masking out the edges. I'll use an image that has correct exposure in the background, but needs to be lightened in the foreground.
In this case, you can see that the pillars will be blown-out if they go any lighter:
Simply use the Lasso or Polygon Select tool, and select around the area in question:
Now make a new layer with that selection. The hard way is to copy, make a new layer and then paste. The quick way is to type command J (Ctrl J for PC users).
The result is a layer above the original that consists of that crude selection:
Now before you begin to mask out the edges, place a white screen between the two layers so you can see where you are masking. To do this make a new layer inbetween the two:
Now select all and select Edit/ Fill...:
Fill with 100 percent white, and you will get a white screen that reveals where your edges are:
Now make a layer mask (reveal all), and begin to paint black around the edges with a soft brush, 100 percent opcacity. Interestingly enough, the smaller the brush, the smaller will be the soft edge radius. That results in a cleaner edge, just don't go too small or it will take all day and have a cut-out look when you are done.
Here is what the image begins to look like as you paint it out (it is a blow-up of her arm):
This is what the layer mask looks like when you have successfully masked out the edges:
Now you have a completely separated layer, and anything you do to that layer will only happen to the foreground.
Go to the next section, grouping layers, to see how this can work to your advantage.
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