I have a couple questions:
- If you were to match an HDR source to the color grade of an SDR source, and the intended final product will be rendered in SDR/Rec 709, would it be best to an HDR->SDR conversion before using the color matching tool?
It would be best to first convert the HDR to SDR and then do a color match.
- When matching a source with little or no film grain to the color grade of a highly grainy source, should you apply noise reduction to the latter source before using the tool, or would that not affect the results either way?
The grain will not affect the results, unless it is chroma noise, but even there the effect will be quite small.