I thought some TD users out there might be interested in a few 3d fractal shaders I managed to port into TD. All the shaders are from Shader Toy except for the menger sponge. I was able to modify the Shader Toy version slightly by referring to a shader from Fragmentarium.
If anyone has and ideas on how to implement rotation into the menger formula I would totally be stoked to make that happen.
cheers
Keith
newer version with rotating menger below