The patterns are nice, but it was obviously done with an overlay, and the monochrome shading looks amateur. The block selection is good as well. The recipe for the chisel has to change though as it overrides the screwdriver included in default which this mod depends on.
I'm yet not very advanced in making shadows, and I think (if I get there) I can modify the patterns. I made them as overlays because, as I looked at the other bricks, I thought, they are also made with an overlay and are just saved with the patterns already applied(correct me if I'm wrong). The chisel recipe is going to be changed soon too, thanks that you said this, I didn't notice.