Any hints or tutorials on how to do this. It is just for a personal project. I have the corian.

Can you be a little more specific??

Bobart will work very well for this. If your releif is about 1/16-1/8 from bottom surface light will pass thru. just play around untill you get the results you want

they are called lithophanes, try searching for that or go under the vectric part of this site for more info from guys who do this a LOT