An Eye Procedural Substance Material.
High Quality - up to 8K textures
Infinite Variations

PBR - Metallic Roughness
Base Color
Roughness
Height/Displacement
Normal Map
Ambient Occlusion

Included
.sbsar file (Substance/Generator File)
UE4 Project
Preset Files
Alpha Maps

Use Info
Import it into Game Engines that has support to Substance from Allegorithmic
Or export the maps using Substance Player (free)
https://www.allegorithmic.com/products/substance-player
Substance 3D for Unreal Engine
https://www.unrealengine.com/marketplace/en-US/product/substance-plugin

Required Product:Unreal Engine