Please help me to understand "Channel Mixer"

[stefan.chirila]

Could I kindly ask for some help with an issue over here

Color issue due to color channels

[issue-S7_00133] I am working on a filmy looking preset and it ends up giving me issues such as seen above. I managed to trace it back to the fact that I was tweaking the colour chanels and had a bunch of negative values. is there any way to avoid this happening? PP3: S7_00133.ARW.pp3 (14.3 KB) RAW: S7_00133.ARW (47.0 MB)