Add a polarization filter coating to the epoxy? https://en.wikipedia.org/wiki/Optical_filter#Polarizer https://en.wikipedia.org/wiki/Optical_filter#Polarizer A

Add a polarization filter coating to the epoxy? https://en.wikipedia.org/wiki/Optical_filter#Polarizer https://en.wikipedia.org/wiki/Optical_filter#Polarizer Also, if the plastic can be "invisible", you can also house it in invisible plastic- thus creating, a exploded working model, inside the resin