Over the past two or three days, I've worked on two images.
This one is lineart for a picture I'm going to work on after the tree is done.
and this is what I have so far on the tree. I'm really liking it, with the exception of the ends of the branches, some of which look like they're cut out of a plank of wood. I'm using a coloring method that I have just thought of in the past few days. IMO, it adds texture and accuracy that other techniques couldn't provide. the only downside: it takes a truly long time. I must have spent about 5 hours on the wood, minimum.
well, here it is, clicking will give you a larger image:
resizing problem fixed, thanks to Ash!