The Grasshopper + Cycles (Raytraced mode) work is progressing nicely. I have made a progress overview video showing the power of creating shaders from the ground up.
These shaders are defined for two new special render contents:Cycles XML for materials and Cycles XML Environment for environments.
Not all available Cycles nodes are wrapped in Grasshopper yet, but some of the more important ones were added today - image texture and environment texture.
Already with the current set of nodes complex shaders can be created. And the nice part is that the definitions are saved in the materials. So eventually we can build a great material and environment library, in theory even light shaders
Enjoy the video