Testing liquid in glass approaches - Gallery - McNeel Forum
Add-on: IOR Reference - BlenderNation
Howto use the Light Path Node to make Realistic Glass in Blender - 2.73 beta - YouTube
PxrGlass
How to implement the different IOR for each metal, for a slightly more nuanced appearance than just the Principled BSDF will offer? It would be a welcomed factor from reality and not