Toggle through the red/green/blue channels to show individual clipping
Edit: if you do these steps, the regular histogram will strongly resemble (but not be identical to) the raw histogram. But I believe this gives a very good indication where the raw channels have clipped.
The ‘Linear g=1’ setting ensures the data is not ‘gamma-encoded’, but linearly maps the light intensities in the raw file to output pixels. In theory this should not change the amount of clipping, but in a quick test I see that it does slightly. Working with linear data should be preferred if you want to emulate the raw file as close as possible.
ACESp0 is a huge color space, so no gamut-based clipping will occur.
I wonder if there is another way, or if what I see is just an artifact coincidence, but if I do the steps above and then do:
RAW → Demosaic → None
Zoom to 100%
Then I get a similar highlight clip indication compared to before, but with different colors in clipped areas, compared to the black/gray highlight indication. Does “RAW → Demosaic → None” bring us closer to a pure RAW clipping indication? Is what I see just a side effect of something else, or is it an intended feature?
I understand that it is impossible to talk about better/closer RAW clip indication, since I have not offered a mathematical description of what I mean with RAW clipping. I think I mean ‘RAW values at or above white point’, but I am not sure.