just to clarify, and i genuinely don't mean to sound rude when i say this... this was a collaborative effort, so it wasn't just one artist; i drew the lineart, including the surrounding environment and colored everything while sticking to green-range colors. this whole process took me a few months. the sketch dates back to late july.
Vinebooru
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the original sketch can be found here: https://i.imgur.com/kugaDnw.png