I have been tinkering with SSS in Superfly renders and I think I stumbled on the solution that I need to verify on several other models to be certain. I've been using the Principled Bsdf node and the Poser 12 manual covers a tutorial on how to set it up and use it. But I have found that a list of Subsurface radius values for different surface types happens to be off by a factor of 1000, values too low IMO to influence true SSS. Plus the subsurface scale is set too high in the associated images in the manual. So by scaling up the radius values by 1000 and reducing the subsurface scatter scale to 0.01, I get a very nice render without the self glow. I've been using one model to tweak these settings and modifying textures to optimize the look.