Name of internally lit translucent carved art What is the name of the art form where a translucent material (could be cylindrical) is carved on the inside and lit from within so the image is rendered in brightness determined by how thick the remaining material is?
With thanks to Chris Meyer from Sector67:  

It's lithophane. 

Sorry I wasn't clever enough to check with the source in the first place, but thanks for asking the question that triggered that!