Roughness defines how light reflects from your Material. This can be done with the Roughness factor or a Grayscaled texture
Roughness factor adjusts the roughness between 1 (100% rough/0% glossy) and 0 (0% rough/100% glossy).
With a Grayscaled texture, the factor is assigned based on the colour. Black parts are listed as 0 (0% rough/100% glossy) and white as 1 (100% rough/0% glossy).
Updated on: 07/03/2023