When Spectrums Collide

*The request for this article was to combine these images as it would have been done in previous versions of Photoshop because not everyone was or is  familiar with layer masks. The decision was made to create this tutorial without the aid of layer masks in order to show a way of creating an image for those that might not be familiar with that method. This method is considered very "old school" and destructive and would not be done this way using today's methods and techniques.