I make fractals in Blender using custom OSL scripts and I was quite happy with this render. There is still a lot of noise and volume sampling artefacts but it's already a
Using osl phong_ramp as a factor? - Materials and Textures - Blender Artists Community
Error when using an OSL shader with node_texture.h
Blender Sushi: OSL / Translating RenderMan RSL to Blender OSL