I need to edit HSB curved. I know there is a filter to convert from and to HSB here. The problem is that I am not able to see the preview as long as I edit, I need first to apply the filter (the image will become all "weired"), do the curve trasnformation and then apply the fiter again to see the final result. Is there any better way of doing this?
Maybe you can take advantage of the fact that Adjustment Layers can have a Blend Mode?
Have a look at this setup:
I simply make three Curves layers (it could be any other kind of adjustment layer) and set their blend modes to Hue, Saturation and Luminosity respectively. (There is no Brightness blend mode. I'm unsure if Luminosity works the way you want.)
This way you can manipulate hue, saturation and luminosity separately.