Multi-Color Effect

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Multi-Color image effect using Advanced Blending / Channels:

1. Open Image
   
2. Drag out the Canvas Size using the Crop Tool set to Non-Destructive (do not delete pixels) to give more space to the Left and Right
   
3. Copy Layer > Move Tool, move to the Left
   
4. Double-Click layer to access Layer Style window
   
5. Under "Advanced Blending" > Click only the Blue channel box (this should give you a combination of Blue and Yellow
   
6. Copy the top Layer > Move Tool, move to the Right
   
7. Double-Click again for the Layer Style window
   
8. Click only the Red and Blue channels (This should give Magenta and Green combos)
   
9. On the Top Layer > Change the Blend Mode settings to Luminosity
   
10. Crop the image back to remove unwanted edges (use a Destructive Crop option)
    
11. If there are still edges you wish to hide:

• Isolate the bottom layer (click on it and turn off visibility on the top layers).
• Select the right side with a Rectangular Marquee tool.
• Fill with Content Aware (the old version). The quick-key is: Shift / Delete, then choose "Content Aware" from the Contents list.
• Repeat for the left side of the layer (Select and Fill with Content Aware (old version)