There is no point for me in running a 3D LUT in BT2020 as there is no way to get UHD Bluray content to the HTPC, so no way to get MadVR magic to work.That's excellent greyscale tracking Manni, after the MadVR cal.
Have you been able to run a 3D LUT for Rec2020 yet?
Also, MadVR doesn't support HDR yet, it only does an (excellent) HDR to SDR conversion. We need the new GPUs with HDMI 2.0a and HDR support in the drivers and APIs for MadVR to be able to passthrough HDR content and not convert it to SDR. Hopefully with the nVidia 1080 and the AMDs coming out, this will happen soon.