I imagine that's merely the work-in-process, for the reasoning of the other trees not being textured.
The biggest concern I have with this piece is the background, as right now it confuses me. I can see you're going for a sort of backlit scene, but I think my problem has mostly to do with the placement and current shading of the background trees. You have quite a few trees in the "middle" and only one tree in the farthest. Along with that, it seems like you're placing the lightsource of the middle trees from behind, so giving them a sort of aura, and I think this adds to my confusion. Because of the furthest tree being the same shade as the light on the middle trees, it looks like each tree has an immediate tree behind it. Not to mention I'd imagine a backlit scene ending up with silhouettes instead?
I think I may have to wait to see what you pull off with it before I jump to conclusions, but right now it leaves me a little lost. There are also other things that come to mind with the above, and that's mainly the lightsource. The backlit scene would be contradictory(and I guess counterproductive) to the lightsource you have going on in the foreground. However, it's easy to dismiss such things because of priorities.
Right now I like how the background is giving me the vibe of something misty/enchanted instead of the typical atmosphere you'd find in an in-game forest.
