Can I ask what are the best / suggested material settings in 3DS Max to get a good canopy glass effect? I am sorry but I am stuck with Max 2015 for the time being, and the DR400 sample model is for Max 2016...

Suggested / best material settings for canopy glass...
-
-
Before we answer your question, but you can't open the DR400 with your Max version? If that is the case we need to fix it.
-
The DR400 max file provided with the SDK seems to be saved with 3DS Max 2016. I have not upgraded (yet) to Max 2016 and I am using Max 2015. 3DS Max files are not backward compatible - so the sample file you have provided can only be opened with Max 2016 AFAIK.
-
We have sent you a version for Max 2013. Please try if that works. If yes, we will put it into our official SDK. It should show you all the different materials. Besides the maps you use, we just use a 'shader hint' to define a material.