At this moment there are two real choices: 1. Realtek "SDR Rec.2020 Limited" This is commonly known as SDR.2020 and converts the HDR PQ gamma to SDR power gamma but leaves the colour space intact. This is very useful if you have a projector capable of BT.2020 in SDR - certainly JVCs do it, and I believe Epson and Sony. Black and white clip are perfectly set (64 & 940), pedestal is correct and obviously colours are effectively in "passthrough". The minimal downside of this mode is a resync between GUI and content as the GUI is in Rec.709 and the chroma banding as detailed by @Sledgehamma above, although it has to be said while that banding shows in blue on the S&M Vhroma Alignment pattern, it's not generally seen in real world footage. 2. Dolby VS10 HDR to SDR So if you either have an SDR projector or an HDFury device to spoof an SDR EDID, you can use VS10 SDR mode. The big issue with this is what we used to call pedestal in the old analogue days - in other words, the level of the whole luma range is raised relative to black leading to an unacceptably grey and washed out image. Again similar to SDR.2020 above, black and white clip are technically correct relative to the raised black floor but the only way you'll get a respectable image is to calibrate black level in the projector and some may not have enough range to do that. Pedestal is one of the big issues in VS10 at the moment and once Zidoo have cracked that (possible with the help of Dolby) then VS10 conversion to either HDR or SDR will be incredible. (note that pedestal is also raised unacceptably in VS10 HDR but not as much as SDR. It is also raised in VS10 LLDV but in that case it is minimal and easy to calibrate out) Realtek HDR to SDR, in line with all these players, is pretty terrible with a crazy black clip at 90 (3%) and white clip at 765 (80%) and the colourspace conversion from Rec.2020 to Rec.709 is equally bad with nasty posterisation artifacts and colour irregularities. Not worth considering.