I'm not talking about drawing smooth curves here, but rather the curves tool used for adjusting color levels. An illustration will be worth a thousand words, here. This is an adjustment in Gimp: ...
I am trying to do a Photoshop tutorial, seems easy, but I can't understand one phrase: `First, I add a curves layer and create a slanted S. What does slanted S mean? Maybe I should "write" S in curves ...
So I understand how a single curve works: If you create a curve such that R100 (in) becomes R50 (out), every pixel that has an R value of R100 becomes R50. Similar deal with the RGB curve: if you ...