Thanks, BB. I'll see how much difference removing the softness makes so far as rendering with Reflect.

What do you suggest rather than Blinn? just a specular node? or maybe just resorting to the built-in Specular?

Any idea at all how to optimize either version to allow spec-only direct lights without having that degree of artifacts?

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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