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2. duplicate the Background layer twice
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3. create a new layer above Copy 1; fill it with a neon blue (preferably #00f7e3); set the blending mode to Screen Copy 2 is temporarily hidden in this image
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4. create a new layer above Copy 2; fill it with a bright red (preferably #e10000); set the blending mode to Screen
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5. merge the colored layers down to their respective backgrounds (red merges into Copy 2, blue merges into Copy 1)
6.(optional) desaturate the original background layer (ctrl-shift-u) red + blue layers are temporarily hidden in this image
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7. set the blending mode of both Red and Blue to Darken this almost resaturates it, but no other noticeable difference
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8. nudge Blue to the right a few pixels until you get the effect you want
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9. nudge Red to the left a few pixels until you get the effect you want
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10. save and you're done!
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I hope this tutorial helped; If you have any questions please just ask!