Originally Posted by JonasHansen
Received answer from Optoma. They propose this fix (have not tried yet). The issue is present on both HDR and SDR on my projector though and their fix appears to be HDR
I do not think that will help. I have found a solution to all the issues namely: jump in brightness with DB2, colour clipping, brightness clipping.
I have an Oppo BDP203 and used its controls to get the DVS test patterns for HDR and S&M patterns for HD to look as they should. This lead me to set brightness +3, contrast -12 (I need to check as I am relying on memory) and Saturation -6 (also need to check) in the Oppo and then to fine tune with the VPR settings.
It also seems to have solved all banding issues in 4:2:2 and 4:2:0, but I had no time to test thoroughly. Picture is a lot darker, but the VPR is now mapping in HDR almost 10.000 nits (on 1000 nits master as per DVS specs).
I am not losing much on the lower end of the scale and colours seem to be ok, but you do not get the same dynamic picture as when you leave it clipping.
I still need time with it to test out more settings before settling with this solution. I would like to get it to clip around 1000 nits (as it should) and to have a brighter picture.
I will post my final thoughts once I have finished the tests, but would also like to hear others what they think of having the projector mapping the full brightness scale.