Looking for Redshift node for editing Levels or contrast etc of shader texture



I have spent at least hours to figure it out but unfortunately without success…

I want just some node for edit levels of some shader texture (glossiness) to make some places more or less rough
i can do it easilly in photoshop but i want to do it in redshift shader graph, can some one help me out please? :slight_smile:

What i have tried so far is node called “RS Color Correct” but it doesn’t work for me