Thanks, AurĆ©lien! Thereās a definite improvement. The purples are still affected by the green, but much less than previously.
Without touching green colourfulness:
v2:
v1, for comparison:
That canāt be avoided though, unless you have laser lights where only one channel is non-zero.
Iāll pick my lighting more carefully next time. 
A light-sabre with a belt clip-on sounds like a practical and portable solution.
But using a laser as unique light source will get you a monochrome image, a bit like sodium lightsā¦
In practice, most colours are not fully saturated, which means their rgb representation contains some of each of the primaries. Thus each control in colorfullness will influence all pixels (to a varying extend, one hopes 
)
Yes, Iām aware of lasers being monochromatic light sources, but theyāre still cool. Now I have a reason (pretext) go get a light sabre. Just like I got a Spider Pro belt holster to fulfil the cowboy dreams Iād had as a kid.
That looks really niceā¦I think a nice addition to the module would be a function like we have with the masking display. So the eyeball icon that displays the image without the mask temporarily. The could be added to the colorfulness and brightness tabs to allow for assessment of the adjustments. Since the tabs are embedded in the module you canāt assess the adjustment easily as you normally would by turning it off or one. I am not sure how hard that would be to implement. Likely not too easy but it would be a nice addition.
Which Cat setting did you use for this. I was playing around last night after updating to a new build to try to test this and it still was acting weird with the green (negative boosted it and + muted it) so I need to double check that I have the v2 in place. I was trying to define in practical terms the actions of the sliders. I was comparing full scale + vs full scale - for each slider using both normalized and non normalized and under bypass and Cat16ā¦also do you do this with gamut compression disabled or at default??
Just curious
Color calibration - colorfulness - #81 by aurelienpierre v2 (as visible in the screenshot); itās not on master yet.
This was with the channel mixer preset (bypass CAT, no gamut compression).
Do not expect complete separation of channels.
Feature got merged minutes ago.
Thanks I thought it had been merged. I understand, well I should say I can appreciate that removing green (or any of them) affects all the colors or should I would think, and depending on the settings to a lesser or greater degree depending on the array of colors in the image . I was just trying to get a practical understanding of the net effect or observed effect on the image so as to determine predictable behaviour. With my build when I increase green it reduces green and when I reduce green it boosts it which seemed counter to expectation from a slider with a color and -/+. When I first saw the slider my instinct was that it was similar to using the channel mixer and the reducing green would be similar for example to removing 0.3 of green ie the slider value from all of the color channels. Clearly this is not what it does but that was what I initially thought it was doing.
I just want to pause and thank you for the time you take to respond and the excellent information. I appreciate the help I just wanted to acknowledge that ā¦online is so impersonal at timesā¦so thank youā¦and similar sentiments go out to others on the forum that have taken time to reply or engage with advice comments and information thanks very muchā¦
Thatās very kind of you, thanks, but all I did was trying to understand whatās going on; I was just one of the confused users here. @anon41087856, @neuralyzer and @flannelhead are the people who did the real work.
I couldnāt resist I was re-reading this post and caught you using the word intuitiveā¦
Pun intended.
The fact that many things are intuitive if you have a math level >= bachelor of sciences proves that intuitivity is only ever contextual. Nobody is born with walking, reading, writing or counting skills, they are all learned along, still people think alphabetical order is something intuitive. So, yeah, my fight is to make people realize that intuitivity is an hidden expectation of new things behaving like old things you already learned so you can spare a new learning process (aka lazyness disguised as rational expectation). Which is silly if you are just starting in a new field or with a new framework.
I truly wonder how many adults could read today if they would have been given the choice to not go to school as kids. I believe most of us can read right now only because nobody asked for their opinion when they were mandatorily sent to school between 6 and 14 or 16. Problem is, people get the choice to be lazy at adult age with vocational skills, and rely on others to do the boring and difficult stuff for them.
YOu may be on to somethingā¦More people need to use DT instead of LR or they will end up in this demographic 
A quote from the article below
āExperts say the gap is due in part to an abundance of jobs in the past that do not require the daily use of reading comprehension and information synthesis skills.ā
Mathematical intuition: when my youngest son was around 5 or 6 years old, the school teacher would be explaining mixed fractions exercises to the class. She would put an exercise on the board and ask the children to solve it. My son would immediately give the answer. It would take the teacher several seconds to verify that my son was correct. She would ask him how he did that. He had no idea how, he just knew.
I was that kid. Problems came 12 years later, in university, because everything had been so easy before, that I didnāt know how to handle complex problems in a methodic way. Method always sounded like unnecessary burden, the solution was right there in front of me, so why bother ? That kind of intuition is short-lived, because you find its limits sooner or later, and then you are no smarter than the dummies who followed methods.
In 5th or 6th grade, or really in pre-school / kindergarten?
At 5 to 6 years old, kids arenāt learning to read or do any math at all hereā¦ I doubt there would be fractions involved 