Another option is my free Poser Python plugin, Matmatic. I don't know exactly what you need to do, but with Matmatic you can write Pythons scripts that actually generate shaders dynamically and write them to individual material files, or mat pose files, or to material collections.

If you have to create dozens of sets of shaders for a figure with numerous variations on individual shader items, but those have to be propagated to many material zones (such as skin shader settings) this is a good way to go.

If, on the other hand, you want to read existing materials from a figure and make a mat pose file, you don't want Matmatic.

Do you actually need "mat pose" files or are you saying you just want to save all the zones together for one-click recall. Because if that's all you want, you should be saving them as a material collection, and this capability is built right into Poser.

Finally, you should be aware that the difference between a material collection and a mat pose file is approximately one line of text, which you can edit any number of ways without having to buy anything. If you really want a mat pose file, you're only a couple extra keystrokes away from that using Poser alone.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)