Shown here is a relief carving in a 4" x 4" bone color Corian tile that is 1/4" thick. The subject is the Zodiac twins, Gemini. The tile was cut with a 1/16" rotary cutter. One pass would have been sufficient, but I ran a second pass 90 degrees to the first. The second pass did very little except clip a few ridges here and there.
This is the same material I use for Lithophanes. This is not a Lithophane but it can be back lighted for an interesting effect.
I spent some time with Adobe Lightroom to highlight the grain produced by the router tracks. These are not normally seen with the naked eye. The photo enlargement helps bring this detail out.