Start with your base, sharpen.
(Picture from
SqueakyMonkey).
Stick this to 100% exclusion, the hex code is #185F2E.
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Duplicate your base and bring it to the top, set this layer to soft light 100%, and desaturate it.
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It's kinda too green for me so add this to 100% exclusion, hex code #0B002A.
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Flatten your image. I think it looks hot just as is, but if you want moooooore then keep on going.
Cut a strip of the image and paste it into a new layer, like a strip like this:
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(Ignore the grey bits, that is to show you it's transparent).
Move the piece down to wherever you think looks good.
Flatten the image.
Stick a white strip somewhere overlapping where the two images meet.
Then add some text if you like, I prefer no text on my icons but it's up to you.
And that is that!!