"Can anybody explain how Dual Quaterion works, and why it is not compatible with Poser and what might be the reason for SM to dicide to not include this into the present Poser release?"

https://www.google.com/search?q=dual+quaternion+skinning

... because Poser development generally doesn't add things like WMing, SSS, GI, PBR, GC, ad nauseam until about a decade after they are standard in other apps (and then mostly in their $500 pro version only)... think I'm kidding? I use a copy of modo 302 from 8 years ago that has all those features on a 10 year old computer. Area lights? Caustics? Accurate blurry reflections? Ancient history. Just a little peeve I have with Poser and in particular that "I could use better software, but then I'd have to be an artist. and what's the sense in that?." Quote from BB. By that logic; Ok, so you just become a time warped "artist" a decade later then? Lol. Don't get me wrong, love Poser and BB's brilliant... but just saying.

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W10 Pro, HP Envy X360 Laptop, Intel Core i7-10510U, NVIDIA GeForce MX250, Intel UHD, 16 GB DDR4-2400 SDRAM, 1 TB PCIe NVMe M.2 SSD

Mudbox 2022, Adobe PS CC, Poser Pro 11.3, Blender 2.9, Wings3D 2.2.5

My Freestuff and Gallery at ShareCG