i would change the air of the underside of the piece. Besides that, great piece. You can even turn the image around and see the same mountain scene-thing again, only the purple mountains are on the lower half of the image. very nicely done!
Wow, really nice mountains. The transition is a bit odd though, i'd think about refining that technique :) (mostly because the colors are too contrasting, needs a smaller dithering for smooth blending)
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