You are posting faster than I can type . I was trying to add to my last post, but here goes the rest of my response to your next to last post:
I don’t follow most of the rest of what you said in your next-to-last post, except that of course embracing a scene-referred workflow allows to produce a display-referred image. I’ve been using this approach to editing for a long time now. But I suspect even you sometimes throw in a few edits that appropriate only for images with channel values in the display range? The trick is to keep such edits at a point past where one is working with channel values > 1.0f.
The whole point of editing is to produce an image to be displayed. You and @anon11264400 are saying that GIMP-2.10 can’t be used to process scene-referred images into images for display. I disagree. I think GIMP is amazing well suited for this task. But then again I’ve been using high bit depth GIMP since 2013, so I know all its remaining foibles. That helps.
GIMP doesn’t have all the tools required for processing extremely high dynamice range scene-referred images. But for less extreme cases it works quite well - if, and this is a big if - the user understands which editing algorithms are suitable for which types of images.
Otherwise I’d be tempted to put a great big “There be dragons here” on top of the option to convert to or keep an image at floating point precision in GIMP, and advise people who just aren’t interested in learning about scene-referred editing to use 16-bit integer precision instead. But I’m sure many Blender and even a few Nuke users learn while processing, and so will people using GIMP-2.10.
I didn’t think anyone ever thought that. But maybe they do.
But the image sent to the screen of an HDR display still has channel values <1.0f. That image is still display-referred. This is something that I suspect will lead to confusion once people start editing photographs and such to display on their spiffy new HDR monitors.
As a complete aside, trying to edit a photograph for printing while using an HDR monitor, well, I can’t imagine trying to do that, unless there’s a way to dial the brightness down to my usual roughly 70 cd/m^2 in line with the ambient light levels where I edit. Monitor brightness and surround have such a huge influence on what an image looks like.
That’s a trick question. The HDR display still has a highest value sent to the screen of 1.0f. Images prepared for HDR displays are still display-referred images. Which is why I think the marketing term “HDR displays” is highly misleading and designed to confuse.