Forza Horizon 4 - HDR Settings

This game does not seem to use the 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 the in-game HDR Whitepoint slider to match your TV's peak brightness (slider values in nits). 

$ads={2}

If your TV always does tone mapping, then set the HDR Whitepoint slider value to several thousand nits.alert-info

HDR Brightness slider adjusts the balance between dark and light. Leave it in the middle position or adjust as you like (image should not be dim, but should retain deep black levels).