I've been asked to recreate this holographic foil effect on a 2d plane:
Specifically the specks picking up different reflections as the card turns.
I think I've got quite close using the Metallic Flakes setting in a Redshift Car Paint shader:
But I really want to be able to define my own noise / pattern.
In this example the reflections are following a pattern that changes with the angle of reflection:
Does anyone have an idea how I would achieve this?