Noob quest but I was just wondering.
Hyllian is the default, fast takes some performance shortcuts to run a little faster at the cost of a little bit of visual fidelity and glow adds a halation/glow effect to mimic the diffuse glow of a CRT.
But how come I don’t really see any difference between them at all expect the glow from hyllian glow.
the visual differences between the normal and fast versions are pretty slight. If it looks the same to you, you may as well use the fast version and save some GPU cycles. 