The thing about the illuminant is that it’s not relating to color temperature (i.e. warm or cold) but rather the spectral content of the light. So daylight for example can be adjusted over a wide range of temperature, but the spectrum (as I understand it) is the same. Planckian is the same situation, different spectrum. Invalid just means the detected light content doesn’t fit one of the ‘known’ patterns, which in the color calibration scheme of things means that the ‘temperature’ adjustment is no longer valid, so it’s replaced by the hue and chroma sliders, to set the illuminant colour and strength of correction.
Another point that can be confusing is that color calibration works in tandem with the white balance module. With the normal scene-referred defaults, the white balance module is set to ‘camera reference’, which should be a 6500K (cloudy more or less) reference value which shouldn’t (usually) be changed, then color calibration does the rest.
But there’s nothing ‘wrong’ with disabling color calibration, and using the white balance module to do all your colour adjustments. It can be less accurate and true-to-life but I suspect that might not be an issue for your style. It suits me in most cases.
Thanks for the examples. Interesting. I’m wondering if using parametric masking to restrict the saturation boost to the already more saturated colours might help to match… not sure.
Looking at the settings you made a pretty strong adjustment in CSB…you can go higher in rgbCB… you stopped at 50%…you can enter higher values. Perhaps this is part of your issue.
Edit: Actually looking closer your CB edit is far heavier handed to the point the snow is blue…You are also adding vibrance at the same time here… The CSB module is making global changes so if you are trying to emulate it I think you would have to start with global changes in the rgbCB module… It has been shown that large brilliance changes are not good in the rgb CB module and are rarely needed. They work better as small tweaks or used in combination to add perceptual contrast. Without the raw file its hard to evaluate this but I wouldn’t call the settings used necessarily equivalent…
I’ve been playing with the deprecated module, found it as @Terry mentioned above, and it does have an effect that’s hard to replicate with color balance rgb. One point that helped was to shift the pipeline position of color balance rgb above (after) filmic, like contrast, brightness, saturation is.