Can a Fresnel node be plugged into Principled BSDF's "Specular" slot to use an accurate IOR?
I noticed you said a Principled BSDF's Specular slot pretty much handled the Fresnel effect, but I also see that it uses a decimal value, and "0.5 is ok for most things."
If you wanted to use an "accurate" IOR value, does plugging a Fresnel input into Specular do the trick?
It seems to act the same way, but since the effect is so subtle, I wanted to be sure it wasn't just adding needless complexity or something. :)