Hi Walter,
I uploaded the wrong pic before, the 3rd image. I’ve modified my reply.
Maybe there is some misunderstanding caused by my state, or my crappy english.
I have a basic concept about ACES workflow.
The pics I showed is not any step in our workflow, It’s just my test, and want to express my question about sRGB footage handling in an ACES workflow.
As I said before, I choose DCIP3 in r3d debayer setting just because there is the same option in the node “Colorspace”'s gamut “in”. I know is not a right choice in the workflow. In this test, I just try to keep the consistency of colorspace conversion in nuke-default color management.
In the 2nd pic, for the same reason, I choose the redwidegamet because my input raw file debayerd as linear-redwidegamet.
I want to show the difference viewing processing between nuke-default and the ACES RRT+ODT makes me missing a reference when handling sRGB footage in a ACES pipeline. And the reference here for me are two things:
- the target sRGB codevalue of X-rite colorchecker
- the consistency of image looks in sRGB viewing environment with pre-ACES pipeline steps.
Especially, the the tone mapping in the processing of scene-refered colorspace to a display-referred colorspace makes me unsure about the conversion.
I’m not trying produce a shot, and this is not our workflow. We do set the Nuke working space in ACEScg.
About the DSLR footage, our HDRI images merged by 3 photos which shot over and under 3 stops around normal exposure. we de-"tone curve"ed (camera curve) the 12or14 bit raw file by dcraw, and merged them into one HDRI image, saved as a 16bit HDR file. This file is a linear and sRGB-gamut image.
These images are the on-set lighting reference for lighting and compositing.
You mean we should convert the colorspace of the DSLR footage into ACES int the first step. And this is just my concern, I don’t know how to judge if I did a right sRGB-ACES 2065-1 conversion.
Different image apearance as before, and difference sRGB code value in sRGB viewing state.
Hope I expressed my question a little bit clearer in this reply…
Regards,
Ivan