Yes we should expose that as a separate parameter.
We designed this to handle lighting your "whole house" and not just the lamp near a screen, so if you have a bunch of people living together, they usually don't want to have the lights change because one person disables f.lux :)
f.lux loads the current ICM profile, not any NVIDIA control panel settings. If you want to calibrate a display so all apps can use it, you should use something that makes an ICM file.
OK, it seems that flux is now holding control over the brightness instead of windows. I had to enable the F9 through F12 option in the screenshot below, because alt+pgUp etc.. was not working for me.
Now I can control the brightness with alt + F11 and alt + F12.
Hope that helps 0_1564779524135_8ae338b8-485b-4c40-a8e9-f08e94c06ade-image.png