![]() LUTCalc's model is scene referred, so for the PQ options I have included the PQ reference OOTF, the HLG reference OOTF (which should be used when converting between HLG and PQ and back) and an EOTF-only option. I have also included options with HLG to choose exposure scaling between the standard (90% white target maps to 50% HLG) and the BBC suggested reference (90% white target maps to 73%). To do all this I decided the best option was to start again from scratch with the HDR code. Hopefully it should now be flexible and correct. If, however, all the OOTFs, EOTFs, OETFs and such are nothing new to you and you find that I'm committing some obvious howlers - please do let me know! If all that sounds like gobbledigook, uh-huh! HDR is unquestionably becoming important, but the days are early, the concepts potentially such a break from today and the opinions and tastes still so undecided that I see these options as more for information to most people for now. The other most obvious feature is what I'm calling the 'Display Colourspace Conversion' tool. This sits after all your other tweaks and customisations and allows you to convert your look from one colourspace (eg Rec709) for use in another (eg DCI-P3). Lastly, I've gone through an overhaul of how the user interface (UI) is expressed. LUTCalc is fundamentally a web app, built upon HTML, Javascript and CSS.
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