Photorealistic Eye Generator is a procedural eye generator for Blender, built on Cycles nodes and generating eyes mathematically. It produces both the iris and the sclera, and the iris bump map also functions as a displacement map for more realistic results. With it you can generate an effectively unlimited number of photorealistic eyes for your characters, usable even in close proximity shots.
Getting textures is straightforward: adjust the parameters to your liking and press the F12 key to render the full set. A Random mode adds another way to work, varying the parameters on its own as you advance or rewind a frame and generating a new eye in less than a second. The system is a complex node tree, so it can be modified, though changes inside its structure may lead to unwanted results.
The generator was created by César Salcedo, a Blender artist with more than ten years of experience whose work has been recognized by Blender Nation and Blender Artist. It works with both the Cycles and Eevee render engines and is compatible with Blender 2.8 through 4.4. Documentation is included, and the developer guarantees correction of any bugs.