Okay I checked out Hitman and fumbled around to get it working - the initial setup was weird - I had to enable Deep Colour on the TV before the Nvidia Control Panel would show up anything but the default 4:2:0 display mode. After changing that parameter I could get 444, 420 and RGB. Still the Hitman menu wouldn’t show HDR as an option I could turn on (greyed out) but hit Play and the HDR logo lit up. After that there was an option to tweak out my peak brightness. Jumped into the game and didn’t notice any significant dynamic range lol ! I’ll have to try harder.
But can anyone tell me how to enable HDR output in UE4.15 ?
Under the same configuration that worked above, I ran my 4.15 project out to the LG as an only monitor (so there’s no hunting to do) via the GTX 1080 on Windows 10 and ran the command lines -dx11 -setX 3840 - setY 2160 -fullscreen. It launched in and looked correct for SDR. Then ran r.hdr.enableoutput 1 (or something similar to) and the image went washed out as if I was looking at HDR in SDR - but NO metadata was sent to the TV to activate HDR handling. There’s a few other cvars but they just changed the image in seemingly useless ways.
The release notes were vague and there’s nothing documented. Does anyone know more about what it takes to actually activate HDR ?
Matt Hermans