I like the feeling you're invoking here, but that raised divot in the shadowed area bothers me. The lighter area on the top of the dark hill might also benefit from some dithering
I have the same Perciv@l theme and its true, perfect.
English: The swiggly in the sky is very lazily drawn. There is so much attention in the lineart elsewhere that that detail seems offensive. The shooter conflicts with the snowman and other than to show your complete and total lunacy, one or the other is not needed. Still, I'm impressed.
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