I thought you might be interested in looking at Arma 3 HDR Setting: only low available? why?.
https://forums.bohemia.net/forums/topic/221237-arma-3-hdr-setting-only-low-available-why/
× Pasted as rich text. Restore formatting
Only 75 emoji are allowed.
× Your link has been automatically embedded. Display as a link instead
× Your previous content has been restored. Clear editor
× You cannot paste images directly. Upload or insert images from URL.