Here's an image of Cthulhu drawn in the style of an green lithoplane image.
The original drawing is from the Canny Comic Con poster and it was developed using GIMP.
Lithoplane is an ancient technique originating in China. The image is created on a ceramic slab which is translucent and allows the light to give it a luminous effect. I think the style works really well with the eerie Lovecraft monster and adds a sense of strangeness and horror.