Demystifying Blender's Specular Channel! How Specular relates to the Roughness channel.

I answer a viewer question about the nature of the Specular channel in this video regarding how the roughness channel affects the specular channel. I cover the inter-relationship between the Specular Channel, the Fresnel effect, and the GGX option in the Principled BSDF. A follow up to this video is here:    • Specularity and Roughness, Part 2. Dealing...   No AI was harmed in the making of this tutorial. 100% human made. 00:00 Intro 00:18 Description of Specularity 01:45 The Fresnel Curve 02:00 Incidence 03:05 F0 and F90 04:00 Index of Refraction 04:08 Specular Channel 04:50 Roughness 05:21 GGX Microfacet Algorithm 06:06 Diffuse & Fresnel 07:15 Example 1, a red sphere 09:30 Example 2, a black cube 12:25 Variable Roughness with Incidence 14:18 Metallic Surfaces & Fresnel 16:30 Fresnel Node #ggx #blendertutorial #fresnel #roughness #blender3d #materials #architecture