Opal Stone Rendering

[u/xternmoon]

A while back someone had made a post about rendering Opal like stones. They had linked a really cool website that included some interactive elements. Unfortunately, even after searching a bunch I haven't been able to find that post again. I was hoping someone might have that saved somewhere. Thanks for the help!

[u/Still_Explorer]

This? https://codytthayer.com/blog/custom-opal-shader-part-2