I always wanted to draw a tree from this angle of view.
Maybe this is not an ideal tree but I am almost happy with how it looks.
The piece is at the point where it is almost overpixeled.
IMO it looks best with 3x size.
I've reuploaded the piece with the sky completely redone. Here's the previous version: http://imageshack.us/a/img10/8656/o8sz.png