Hey folks,
I've just created a page here and I'm stoked. I'm a technical artist and I'll be posting Houdini, RenderMan, and OSL stuff.
This one's a freebie that calculates the cosine angle between camera vectors and point normals in Houdini and writes that as an attribute to your geo.
https://github.com/arabadzhiyski/facing_ratio
I hope that's going to be useful for some of you.
Cheers!