Yes,as awesome as this render is, the fact the Chris is using Sigma 2 makes me skeptical about the flickering it will show in render.
At any rate this project is a milestone for Lightwave.
A great focus for the Dev team to work on fine tuning Lightwave's renderer for sigma in animation and VPR. Chris's combination of SSS and spec is the best and fantastic r & d for the software. VPR should be able to render this node and it should be refined to be animateable if there are issues.