Originally Posted by chronitis
Thank you for the clarification. You may have just saved me some cash. Quick question: Do I need to reset the custom tone mapper for everything to fall in line or does this bypass the eotf entirely?
Are you working with a 2018 or a 2019 LG OLED?
For 2018, there is no custom tone curves.
For 2019, there are custom tone curves, but they do not need resetting prior to calibration. They can be adjusted and experimented with after calibration if you want, or left at default.
For 2018, you will still need an HD Fury or some other method of sending HDR patterns, but Dolby Vision is not possible with LightSpace unless you use the method outlined in my previous post and use a 1D LUT from HDR. For this you would just "Enable Calibration" from Device Control Template which bypasses the PQ EOTF and allows you to measure/adjust to 2.2 Gamma. The issue is that a custom 1D LUT has differing unintended effects on different picture modes. With HDR and Dolby Vision, it affects the black levels undesirably. (This is the same for 2019 LG's too)
So for 2018, 2 point White Balance adjustment is the best you can do. You can try manually calibrating the Dolby Vision full grey scale with R. Masciola's DV Pattern suite, but I wouldn't recommend it at all.
For 2019, you can use the iTPG for both HDR and Dolby Vision very easily as outlined in this post here
, and is further discussed later in that same thread. Full instructions (in a written guide form) along with any relevant/required files are available to all users with a paid license of LightSpace/ColourSpace and can be obtained from
upon request. The reason for the paid license restriction is that the Device Control Template required to carry out the procedure is also only available to paid license holders so they would be useless to anyone without such a license.
It must be noted that the 2019 method using the iTPG guide is written with the assumption ColourSpace will be used to carry out the calibration as it is much easier to do with the more modern interface and new capabilities. It can be done using LightSpace, so anyone without a ColourSpace upgrade can still do it, but it will be a little more cumbersome.