This is an anisotropic material that uses a sierpinski squares pattern. It is completely procedural and has NOT OSL code. So it is available for GPU rendering. It is a cycles version of my OSL material.
I have included 5 presets and their renders.
The model has been made by Robin Marin (@tuqueque). I have used the 2.61 bleder test version. You can download it here. It was created to test materials and it is a CC-BY lincensed blend.
EDIT: Now it uses new Module option in Math node instead own Module node group.