quote:

"SteelixB"
The HST uses something like glass_nm.TgPcDx you'll notice.
Like I said, all _nm does is stop it being compressed, therefore you don't lose quality, so somewhere along the line, RSDL probably decided it would be best to use _nm to prevent compression on glass.
As to why you don't have alpha, I'm unsure, but in material settings, make sure transparency is set to none. Remember that transparency and alpha are two different things... transparency refers to either opaque and transparent (as in completely see through).