I've suddenly found this in my folder with some different things.
And yes, in contradistinction to this drawing https://www.weasyl.com/submission/415960/limbo-old-art it's a screenshot manipulation: only the wolf and the boy have been drawn.
NdC (c) me
Link
Phantastus
I remember stumbling across these on FA and really loving them-- Limbo is such a gorgeous game and I remember being so disappointed that there wasn't more to the forest realm. Seeing stuff like this is a really cool "what if"!