This is the last result I got last night, with really high quality render settings. Had the Mean_Free_Path at 2.2. Getting closer; I think I'll have to turn down the ambient a bit on my ball prop now, but I'll also lower that Mean_Free_Path number a little bit more.

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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