Timeline Working Colourspace

Just looking at the new colour management in v17 and I'm stumped. Can anyone tell me what 'timeline working luminance' means? I've read the manual, and I'm afraid it makes no sense to me. To explain a bit further, I'm trying to use the colour management just for the input colourspaces - I'll apply my own output LUT and skip the output DRT completely. So, I select colour managed, my input, timeline & output colourspaces all as LogC and the output DRT set to 'none.' This setup should be the same (as far as I can tell) as having no colour management at all, but the 'timeline working luminance' gives different results. Why is this? Besides, what does timeline working luminance even mean in this case; I'd say the timeline is set to LogC, but that's a scene-referred colourspace, and I can only enter nit values which obviously relate to a display. Any ideas?

Oh, and to explain why I want to do this (and I did it in v16 all the time), there are a few reasons: First of all, I want to make the most of the colour management, but have a pool of output LUTs that I want to use instead of the 'DaVinci' output DRT option. Ideally blackmagic would allow us to create our own custom output DRT options, but they don't (yet). Until they do, this is the best I can think to do. Also, if I want to use colourspace aware grading tools like the HDR palette, then resolve needs to know the input / timeline colourspace. Presumably with colour management off entirely, these tools won't give the correct results.

Thanks

viewtopic.php?f=21&t=125567

I've moved this post (and corrected the subject):

viewtopic.php?f=36&t=134547