The Material section of the Library certainly shows up for me, regardless of whether I'm in the Pose or Mat rooms... is this what was being discussed earlier on?

What version of Poser are you using Victoria-Purplehair? (sorry if that's already been covered and I've blurred over it)

Using Pose files to apply mats is pretty outdated, in my understanding... a workaround really, I believe, from an earlier time? Maybe there are good reasons for still doing it... other than the fact that old habits die hard, and all that???

So... you should really be going down the mc6 / mc5 files route I would have thought, if you're just starting out??

As an end-user I'd certainly much prefer to see that... at least.

Cheers