A topic that has been brought up a few times, but that will need to be decided eventually is what the “intent” of HDR rendering is going to be for this group.
There have been defined two groups/camps:
-aesthetically/perceptually similar to SDR
-content is optimized/maximized for HDR
As a workflow/pipeline I strongly lean towards having a perceptual match to SDR. If I take a camera image and run it through ACES and out to a monitor, I would expect it to look the same (well, similar) on an SDR and HDR monitor. I have heard this voiced a number of times in this group. This is also consistent with other current HDR strategies/standards like HLG.
For the content producers/studios that seek an “optimized” deliverable for HDR (brighter, more saturated, “poppier”, whatever), this is almost certainly going through another grading pass anyway and can be optimized there, as long as the Output Transform is not limiting or severely negatively affecting creative choices.
Like my other post, I’m hoping we can eventually establish a “target” in this area so we have something to move forward with.