This adds a fresnel conductive OSL preset to the Text Editor. Based on a patch by Lukas Stockner.
Differential revision: https://developer.blender.org/D145
See the differential for details.
* Added Westin Sheen and Westin Backscatter closures for testing, useful for Cloth like effects.
Only available via OSL, added an example OSL shader to the Templates (Text Editor).
* Add a few more OSL templates to the Text Editor, so people can use some of the OSL only shaders and closures.
* Temperature (Kelvin) to RGB converter
* Wavelength to RGB converter
* Ramp closure (Phong and Diffuse)
* Toon closure (Diffuse and Specular)