I sketched a future illustration for the book, but there are difficulties with a 3 (distant) background. I am waiting for criticism from you … and help at some points
Well taken the perspective, I don’t think we should even be able too see the horizon line necessarily…
And if it’s about how you should render the trees: Don’t. They’re in the background, you don’t want to ad any texture on them or else they attract too much attention.