One of the things that allows Graham to have the eye that he does is that he studies trees in nature; how they grow, how they die back, how they decay, how they weather, etc. This means that when he goes to carve or work something, he has a wealth of knowledge and a closet full of examples in his mind from which to draw. I think most artists don't see what he does because they've never seen it before for real. I've seen plenty of carving done on trees that looks like just that, carving done on trees. Graham's technique and experience because of regular observation give him the ability to create something that looks like it may have actually happened naturally. If you don't study nature, you can't duplicate it.
I'm going to take a walk...I need to study more...If only it weren't 35 degrees in late April!