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This tutorial will show you how to easily add a subject to a digital background in Photoshop.
There are a million different ways to composite—right or wrong I am going to show you what has personally worked for me. It also helps that this background has a lot of texture and is quite forgiving!
The most important thing is matching up the light. You want the light in your original image to match the light direction of the digital background. If the lighting on your subject does not match the background you are placing them in you are setting yourself up to fail.