It gets rid of the raw clipping indication (since there are no pixels reaching that value), but the magenta stays.
I’ve also found that filmic with color science v6 is unforgiving with blown highlights. Here is a sunset with filmic defaults:
Simply adding desaturation using the extreme luminance saturation does not help, as the spot remains dark (darker than surrounding, not clipped areas, like the sky):
Here is the raw clipping indicator turned on:
v5 with its 3.8 default preserve chrominance = power norm looks like this:
v6 with preserve chrominance = luminance Y:
Of course, filmic does not know what’s clipped at the raw level; for it, highlights are values just below, and those above, the white level one sets. The sun disc is obviously considered to have ‘extreme luminance’, since it’s affected by the saturation slider; however, it gets mapped to something that is not extreme luminance at all:
(The dashed outline belongs to sample the area shown in the color picker; the one inside, the rectangle with solid lines, shows the white level picker of filmic.)
@anon41087856 – help me Mr Wizard, what’s going on?
Does filmic figure that the blown sun disc is an extremely bright, saturated magenta, and drop its brightness to keep the colour? But that means that relative brightness is not preserved in the image, does it not?
I can lower the white point, so the disc turns white:
But that’s quite ugly, still. I can tweak reconstruction to add a bit of blur, but…