Assassin's Creed: Odyssey - HDR Optimized Settings (Patreon)

The game is NOT using/applying Xbox/Playstation HDR Calibration app settings.

The game has a really good HDR implementation offering precise controls of both Peak HDR Luminance and Paper White values (the last one will impact both in-game Menu luminance and gameplay Gamma).

If you have an LG OLED and:

> you're using Dynamic Tone Mapping or Dynamic Contrast:

• Set Maximum Luminance slider to: 4.000 (nits);
• Set Paper White slider to: 150 (nits) or 200 (for G3).

> you're using HGIG:

• Set Maximum Luminance slider to: 1.000 (nits; as there's a bug where anything below this will just trigger HDR "Off") or 1.500 (for G3);
• Set Paper White slider to: 200 (nits).

If you don't have an LG OLED and:

> you don't have an HGIG option:

• Set Maximum Luminance slider to: 1.000 (nits);
• Set Paper White slider to: 200 (nits).

> you're using HGIG:

• Set Maximum Luminance slider to the corresponding real Peak HDR Brightness for your TV (in nits) but don't go below 1.000 nits;
• Set Paper White slider to: 200 (nits).

The game also has a regular "Brightness" slider and pattern which shouldn't apply to HDR (in theory) but it does alter the HDR exposure too. Try lowering it by -1 click for best results in all cases.