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- Joined: Wed Feb 04, 2015 9:04 pm
Benjamin de Menil wrote:how does changing the temperature in resolve (on color wheel tab) differ from using the gamma color wheel to heat up or cool down?
Might be better to use the term "mids" when describing an action with the middle wheel - technically you are not adjusting gamma -- there is a multiplier, yes, but it should not be confused with a color temperature shift.
Without a specific metadata reference, there is no way to determine what the scene-source color temperature was at the time of image-gathering. This was discussed not that long ago before there was a "Kelvin" slider in Resolve. What you actually have is a "mired-shift" control.
https://en.wikipedia.org/wiki/Mired
What you are doing is essentially adding a gel filter to your post-production matte box.
Where this goes off the rails is when you have clipping or crushing at either end of the overall image -- whites may be clipped unevenly to some (not found in nature, but chain-sawed at the top) value -- but they are still R=G=B as far as the electronics are concerned. A sky, for example that veers off toward cyan right before it is truncated. Black, not so much -- you expect 0=0=0 if the lens is capped, right?
So trying to offset a color temperature error day/tungsten/fluorescent can be approached using a mid-hue adjustment in a lot of cases. Where it gets weirder is in the mixed-light or cross-light circumstance, and this also happens with illumination that is not full-spectrum (stadiums and city street lamps).
But this is not gamma, which is a contrast relationship, and more relevant to display.
jPo, CSI