Is lithophane carving surface toward lightsource or viewer??

[kristenanne77]

After the surface of the corian material is carved out (carved side), there are two sides. The carved side and the other smooth side. Which is the side facing outward toward the viewer ? The smooth side or the carved side, or does it matter?

Thanks
K

[Xxray]

Carved side out, it matters.
Looks blurry from the other way [just hold it up to a light and see]