I now have IES lights working in Poser. This will work in any version since Poser 5. It's a matmatic script that reads an IES file and generates a Poser light shader with math nodes that implements what is in the file.

Just say something isn't possible in Poser, and I can't help but look into it.

I would have done it much quicker but it took me a long time to understand the IES spec. The script is actually only about 40 lines of code.

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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)