The homework - I worked over it with a fineliner after putting in loose foliage, too cotton-candy. I like the idea of very loose natural with ruled man-made, though I very much liked the Doig example you put up, Sebastian. Lots of tension between the trees and the building, lots of story.
I love this one. it is very Japanese to me and perfectly encapsulates the relationship between human order and perspective on one hand and the fluidity of natural forms. I saw a programme on Benoit Mandelbrot last night and how the complexity of nature has a formula too.