surface textures like Rembrandt

Yofiel

This seemed interesting enlough to share.  Rembrandt added ground glass and ground sand. It's like specularity in modern surface textures for 3d modeling. Also the translucent layers are intereesting, I dont know any direct way to reproduce it. Here's a bit on it from Youtube where the examine the pain with electron microsocpes and spectrometers (click it) 

I think maybe you enjoy the video )

barbult

Thank you; very interesting!