Glad you like it. :-)

I think maybe the bump map could be improved. But normal maps still provide a very good way of getting detail without increasing the polys and slowing everything down.

Here's another test. On the left Mike cruelly truncated but rendered as geometry: Full Raytracing;Indirect Lighting: Lighting quality - Good (two distants); Accuracy: 4 pixels.
Render time: 1.02 min.
On the right, the normal map version on a plane, same setup. Render time 4 sec.