I’ve made an interactive 3D dice puzzle in CSS, The puzzle is totally solvable from the photographs under, however the totally interactive model is right here: https://codepen.io/chengarda/full/RwyKvwz

The empty dice has nothing in it, the intention of the puzzle is to fill it with every thing that it lacks.

The puzzle is designed to be simple to guess, however exhausting to unravel – i.e. you could effectively be capable of guess the reply to all 6 faces after fixing just one (or none!), however correctly fixing each face is extra of a problem.

Knowledge tag: Relies on some exterior data, the place there could also be a
discrepancy Wikipedia is used because the supply.

Hint:

Everything is a clue.