In case it isn't clear, I should add that the render from a few posts back is from my shader *without* the Reflect and Blinn nodes. The point of this thread was how to use those nodes properly—and usably. The shader at the top that includes those nodes was taking a really long time to render.

I would actually be satisfied with the non-Reflect+Blinn shader, I think—IF PP2014 could render dynamic hair with specular-only lighting+IDL without leaving those nasty blotches.

I'm attaching an earlier render with just the Env Sphere + a spec-only infinite to show an example of the artifacts I'm talking about. The big splotches at top left are the most egregious, but there are less than unacceptable areas in other areas of the hair as well. There are of course threads that talk about this elsewhere, and it's not limited to dynamic hair, but the artifacts do seem much worse with hair than other objects.

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Hardware: AMD Ryzen 9 3900X/MSI MAG570 Tomahawk X570/Zotac Geforce GTX 1650 Super 4GB/32GB OLOy RAM

Software: Windows 10 Professional/Poser Pro 11/Photoshop/Postworkshop 3