ArchViz Glass for quick renders in Cycles? I have seen a number of different opinions on what light paths should be sent to the mix shader for doing archviz glass for quick renders. I've always used either just the shadow ray, or the shadow ray and the reflection. Some suggest using a combination of shadow, diffuse and glossy and I've even seen some including more beyond that. 

What is the correct way and more equally important, why?

I'm putting together a general tutorial on Glass and I really want to ensure I'm giving out the optimal method here to the viewers.
Note: This has nothing to do with physically based glass.


Andrew Price reccomends this 'Glass Hack shader' specifically for archviz renders, where caustics aren't that important. Relevant part of video here

Working principle
It doesn't affect Shadow, Diffuse and Glossy rays in any way, but your camera still sees a reflection when looking at it.

Pros: Very fast, low noise
Cons: No refraction