On the whole, the scene has a fantastic mood. The tall aspect enhances the deepness of the chasm. You eye is drawn up through that. The large dark shadowed imposing rocks above. You have lots of cool silhouetted rock edges and sense of depth. The dark areas focuses attention on the smaller lit areas. It's not usually good to fill a picture with lots of detail everywhere. You have that strong orange/red area, directly below that, the little patch of blue sky, the small patches of light on the water, the opposing dark stones in the water. Even that tiny bright patch in the distance aids the composition. It's a focus of attention. Take that out and the scene would lose impact. You can also see a triangular compositional structure in the whole thing. There are lots of compositional rhythms going through this. Global illumination makes a scene like this work in TG2. It wouldn't work well without it. It's a very effective dramatic set up in my opinion but don't lose those key elements. The concept could yield a host of renders. Different POVs etc. The rock colour could be very subtly broken up more but the rest is really great.
