Thanks for all the comments. I am trying to do a bit of a crop render of the right hand side to try some of the bump map ideas presented by Tangled_Universe. If it works out, I may be able to fix the tree without doing a full re-render.
Josh: The problem is neither the model or TG2's rendering, it's me! I am still working on figuring out bark bump maps and texturing.
Calico: I am not exactly sure what white dots you are seeing everywhere? It could just be the blown out reflectivity on the leaves that are in direct sunlight. If you do a Google image search for filtered sunlight, you will see the same thing in most photographs.