EyeWorks Eye generator is a procedural eye generation tool for use with Substance Designer, and Substance Painter. It comes with obj and fbx meshes, example scenes for Painter and Marmoset Toolbag3, Designer source files, and 6 eye materials already generated, it's available for purchase on my webpage at https://www.jjeverson.com/products/eyeworks
Feature video and how to use here:
https://youtu.be/ooxqQaFKMQE
Please email me with any questions or feedback! Would love to hear from the community :)