To the above comment, why would true randomness be incompatible with a block universe? The example of photons reflecting, surely you could view the universe as deterministic aka the photons that reflect were always going to reflect, which ones is still random but the reflecting ones were always going to be the ones that randomly reflected and so the block universes 'future' always contained those photons reflecting and the others passing through.
To the above comment, why would true randomness be incompatible with a block universe? The example of photons reflecting, surely you could view the universe as deterministic aka the photons that reflect were always going to reflect, which ones is still random but the reflecting ones were always going to be the ones that randomly reflected and so the block universes 'future' always contained those photons reflecting and the others passing through.