In this video, I discuss the new IOR Index parameter in the Specular section of the new Principled BSDF in Blender 4.0. I also show the updated Specular Tint parameter.

#blendertutorial #iorindex #indexofrefraction #blender4 #speculartint

Here is the material tester file used in this tutorial which I developed for testing purposes. https://drive.google.com/file/d/1Jor8...

00:00 Introduction
00:39 Two ways to set specular
02:45 Some theory behind index of refraction
03:08 Specular highlight
03:50 The fresnel curve
05:20 About refraction, how it relates to reflections
10:00 Specularity and backward compatibility with 3.6 files
12:18 IOR Level linearizes low end reflection control
15:28 Examples of using IOR Level
13:33 Turning off specular reflections, diffuse only
19:12 Using Specular Tint