Converting the basics would be really easy I bet. Some nodes wouldn't translate because they have no direct equivalent I suppose, but you could get close. For example, Poser's implementation of Cellular is probably not exactly the same as others. If you guys want to give me some pointers to any docs I could read on the file formats and how the nodes work in these other systems I'd be happy to look into it. Also, giving me samples of basic shaders so I can verify that I'm replicating the same contents would be good.

I've also thought about getting started on writing a Poser shader-to-matmatic converter - basically take any existing shader made however you made it and de-compile it into a matmatic script. Then if I had compilers for other engines, you could just point it at a Poser shader and it would de-compile to matmatic and then compile to lw or vue.

Poppi - the Loom script I posted in the RDNA node cult has all the math for calculating weave patterns, applying multiple thread colors, making plaids, doing the micro-thread pattern, loose fibers, distorted weaves, etc. It is expressed in matmatic mathematical notation - that gets compiled into a Poser shader tree automatically. I could compile it into other systems pretty easily.

Loom Script
Plaids Using the Loom
Making your own weave patterns
Downloading weave patterns
Loom showing off

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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)