Very interesting, on CPU thread limits for Poser. I took a look at Daz Studio, for comparison. Apparently Iray running on CPUs-only can use 32 cores, 64 threads. But I suspect that Poser's Firefly (even at 16 CPU cores, 32 render threads) would be about as fast to bring in a production-usable non-grainy no-speckles render. Perhaps faster.

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Learn the Secrets of Poser 11 and Line-art Filters.