1. Hi, Bryan. Thank you for your generous sharing of this knowledge, but I have two questions: 1. Does the linear workflow can't use curves to correct colors, or can‘t adjust gamma parameters? For example, RGB Gamma in the CC node.
    2, I learned that as a compositing artist need to learn photography, but there are many contents of photography, what should I study specifically? Look forward to your answer!

    1. 1) Gamma adjustments work on linear images, but the results will be a little different than what you expect in comparison to a gamma-corrected image. A linear image will respond more strongly to a gamma adjustment than most sRGB images. On the other hand, a sRGB image will respond more strongly to a Gain adjustment. It is sometimes useful to do a temporary gamut conversion into sRGB to color correct, then convert back to linear; the Ranges controls are particularly fiddly when you try to use them on a linear image—you sometimes have to really crunch down the low end to limit it to what you as an artist perceive as the shadows. Changing the image's gamma space first lets you use more reasonable settings. Some other operations also benefit from doing that, like glows and luma keying.

      2) Pretty much anything you learn about the craft of photography is useful in compositing. After all, we're trying to simulate what happens in the camera in order to create the most believable image possible. Although I suppose the philosophical parts of photojournalism are inimical to what we do: Fooling people is the point. I guess the best things to learn are the ones that excite you the most as an artist—the experience you pick up from doing any kind of photography will inform your work as a compositor, and you're most likely to get a lot of experience quickly if you enjoy what you're doing and are trying to excel at it.

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