Improve your materials. Specular and Roughness. KeyShot tutorial

Are you still using the materials from the library and are afraid to tweak their parameters? In this video, I'll show you what two of the most common and most powerful do when it comes to creating and configuring materials.
Improve your renders in KeyShot or any other software.
Alfredo Mendez. Industrial Designer

[@a1choco]

What does the refractive index do?