(Not the default *.mat files but *.brt
which are what's used behind the scenes in Bryce to make a Material)

The DTE – will delve into it later though...
I have too many bumps on my head, as it is hahahahaha

The head bangin' and sometimes head numbing DTE uses a Music Mixer/Effects board analogy... look at the terms used.
It's a composition studio.
Reminds me of the good ole synthesizer dayz... ARP comes to mind.
This area gives you control over Noise Types that are the building blocks of all textures in Bryce.
If you want to save a *.brt simply Shift+Click on the word combination above and select Add.