[cyberax]

Maybe a cylindrical glass instead?

[fellerts]

I tried that. Refraction makes it hard to understand what you're even looking at. https://fellerts.no/img/epoch/first-cast.jpg

[cyberax]

I was thinking about a larger with less curvature glass. It might also be interesting to see if it's possible to match the refractive indexes of the epoxy and the glass.