With Volcano, he has created a landscape that is both natural looking and other-worldly. It reminds me of a moonscape or perhaps the surface of a distant planet. Bird's-eye maple was a good choice for this type of sculpture because the "eye's" really stand out, adding extra texture to the surface. I'm sure he sandblasted the surface to get the effect and, based on a similar piece on his website, I believe he ebonized the left side by burning it. The quality of the bird's-eye maple is exceptional. Any woodworker would have loved to have gotten a hold of it, so it is great that it wasn't turned into a boring piece of furniture.
I find Wave to be aesthetically interesting and technically confusing. I love the contrast between the light/dark and the waves/blocks; the randomness of how it alternates between waves, blocks, straight lines, and gaps;
that there are enough gaps on the right side to see the wood grain underneath; and the lack of fastidiousness, that imperfections are part of the art.