вт, 7 нояб. 2023 г., 18:47 Andrew Randrianasulu <randrianasulu@gmail.com>:


вт, 7 нояб. 2023 г., 18:32 Andrew Randrianasulu <randrianasulu@gmail.com>:


вт, 7 нояб. 2023 г., 18:13 Andrew Randrianasulu <randrianasulu@gmail.com>:
https://blender.stackexchange.com/questions/46825/render-with-a-wider-dynamic-range-in-cycles-to-produce-photorealistic-looking-im


well, this one says EXR can hold quite a big value per channel, way above 1.0f, obviously.  But for displaying (and encoding?) it must be compressed back to device-specific 0 - 1.0 range.

Thing is, if I open exr example file in gimp 2.10 and re-export it - it retain its above 100% values. It does not do this if I do this same roundtrip via cingg. So yea, we seems to be clamping at output.

and this article about Premiere tries to explain Scopes, and especially floating point vs 8bit input - Premiere apparently can limit this setting for scopes themselves....



so, HDR as used in ultra HD need some scope that goes to 10.000 (so, logarithmic I guess ...)!

something we should write somewhere in TODO, I guess .....

second technique about dealing with too shadowy video:


=====

A CREATIVE USE OF BLEND MODES

This tip was suggested by FoodShipNine.

If all you want to do is control black levels, but let highlights float – which would apply to most web videos – here’s an option.

  • Using File > New > Black Video, create a new video clip. This contains a single color – black – with a video level of 0 IRE.
  • Place it above all clips in the timeline, similar in concept to an adjustment layer.

  • Select the black video clip then, in Effect Controls, set Opacity > Blend Mode to Lighten. This sets all pixel grayscale values in all clips below the black video clip to whichever is lighter, the black video clip or the video itself.
======

so, if we does not have this mode we probably should :)

https://prolost.com/blog/aces


according to this article Tarantino unintentionally got his own color space { I think this is a joke, too uncinema-tic for understanding it }

====

The ACEScc log color space is, in my experience, a creatively-friendly color space for grading. There’s also a tweaked version of it called ACEScct. The T is for “toe,” so this is the profile favored by Quentin Tarantino.

=====

this made me stop and laugh! Not sure why .... hopefully all of this can be realized by those cube lookup tables? 








Still not sure where, may be in fader? (where fade can't be more than 100%) . May be its time to ask Lion (Adam).