The Substance plugin enables the use of Substance materials directly in Unity.
Whether you are working on games, visualization and or deploying across mobile, desktop or XR, Substance delivers a unique experience with optimized features for enhanced productivity.
Work faster, be more productive: Substance parameters allow for real-time texture updates in editor or at runtime.
Substance in Unity contains the plugin for Substance Engine and Substance Source
Import and customize physically-based Substance materials created in Substance Designer with support for Unity Standard/Standard (specular) shader and HDRP
Substance Source : Get 1000+ high-quality customizable and plug-and-play PBR materials.
Substance in Unity Documentation