I just got very curious about the 4 choices receiving no votes. I kind-of feel sorry for them.
These all seem very specific to me, so maybe that’s why they didn’t receive any votes:
Shader: Rough Surface (Oren/Nayar), Shader: Metal Surface (Cook/Torrance/Sparrow/Ward), Medical Volumetric Image (DICOM) loading and rendering, High Dynamic Range (HDR) image tone mapping.