DCArt posted at 3:45 PM Tue, 11 April 2023 - #4461786

I'm still not convinced that that "Redfilter" node plugged into the Subsurface input is the right way to go.Yet, I can't see how that would produce geometric grid lines on a render. 

When I was playing with that node when SSS was first released with the PrincipledBsdf, I would plug it into the Subsurface color.  But I didn't deem it relevant because the resultant map through that node is a grayscale image based on the red channel.  Now, if you plug a CombineRGB node into the Subsurface Color channel, you would be connecting an actual color map based on the Red channel.