I rated this highly because I think it's an outstanding concept, executed almost perfectly. The curved and wavy lines make for a very strong composition without any hint of disorder, and the idea of flowing current is communicated very well.

I know it is fractal generated, but every line is placed so well that it is almost hard for me to imagine that it wasn't created by hand. The shading and light on the earthy greens looks great, the lighting especially looks very natural and warm. The only suggestions I can give have to do with some of the colouring: I think the browns are a little bit dull for me, some of the shading looks like it has a slight violet or grey tone that I don't personally find appealing. I think they could be improved with some warmer, more saturated browns for shading, to give them a bit more depth. I like the texturing, it adds a lot of interest without overpowering or being too distracting. I also have to ask if you would mind telling what formula you used for this?