Watch Dogs: Legion - HDR Settings

This game does not seem to use the PS4, PS5 and Xbox HDR system calibration settings. 

Try to find data about the peak brightness of your TV on the site RTINGS.COM (value HDR peak brightness 10%). Before adjusting, make sure you have set the TV settings correctly.

Adjust HDR Peak Brightness slider using the table below:

HDR Peak Brightness Slider	Actual Game Brightness, Nits
300	500
400	510
500	600
600	675
700	740
800	840
900	930
1000	1000
1100	1100
1200	1200
1300	1280
1400	1350
1500	1430
1600	1520
1700	1620
1800	1680
1900	1740
2000	1820
2100	1900
2200	2000
2300	2100
2400	2180
2500	2230
2600	2330
2700	2400
2800	2550
2900	2550
3000	2600
3100	2700
3200	2800
3300	2820
3400	2870
3500	3000
3600	3100
3700	3100
3800	3200
3900	3300
4000	3350

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The HDR Paper White slider sets the exposure value for the image. To find a satisfactory value, look at surfaces that are brightly lit during the day (eg walls, road, etc.). With a correct value, you should be able to see detail of the bright objects, but the image should not be dim. The recommended value is 120-200. 

If your TV always does tone mapping, then set the Peak Brightness value to a few thousand nits and adjust the Paper White slider to an acceptable value.alert-info