Lots of people think using a layer mask is only for the advanced Gimp users, fortunately this isn't the case at all. Let me explain you the basic usage of layer mask on a easy to follow step-by-step example.
Rex is the most advanced humanoid in the world and it was shown to the public yesterday in London. It has a beating heart and eyes that can see. Meet Rex and its human doppelganger with bionic arm.
