SunXi wrote:specular light is the reflect of any light source on the stone
Thank you! Yes, I know, when I said "uniform lighting" I also meant no specular light.
But it's very difficult to do with a point-and-shoot camera and no other equipment (like screens)!
I went outside and waited until it was a bit overcast.

Did you notice some of the photos are of the "bottom" of the stones?

It'd be nice if you have yet another 50% random top/bottom texture!

(Did you fix the wooden grain patterns on the board? They should be vertical (|||)...
or at least, give the user an option for horizontal or vertical grains.

)
But I enjoy this; more photos later.
Thanks again!