R3D - red files - Ipp2 pipeline

[Badi]

Hi,

for a new project we will shot with a red camera.

We will develop files in davinci resolve exports prores 444 (not exr or dpx ) and make vfx in after effects. 

What I am not sure is how to handle the ipp2  color workflow in after effect.

I am planning to export ipp2 wide gamut from resolve and use color io to manage the files in after effect.

After vfx we would not go back to resolve as we need to export files with transparency.

Also we want avoid r3d in after effects as it is less optimized.

Is some one has an advice or a pipeline to share to maintain the right color pipeline in AE. 

Best

Badi

[Thomas Singh]

You handle the color management inside of DaVinci Resolve when you create the working files. Set it to Log3G10/WideGamut and render the files. In AE I would simply not modify the clips, simply turn off the color management and I/O same as source. 

[Badi]

Thanks 

so you suggested to never use color management even in resolve?

or after vfx, I can work in aces and specify  Log3G10/WideGamut as inpu transform and  rec 709 as the output

 

[Anton Meleshkevich]

You should work in linear gamma for compositing.

In Resolve in camera raw tab of r3d files set color science to IPP2, gamma curve to REDlog3G10, color space to REDWideGamutRGB. Then export dpx sequence / prores / dnxhr. Then, in compositing app, you should to transform these files from REDlog3G10 to Linear gamma. Then you do your compositing, looking at it through 'linear gamma to redlog3g10 transform + IPP2 LUT + rec709 gamma to linear gamma transform'*. When you finished, turn off transformations and a LUT, you've used for preview, add linear gamma to redlog3g10 transform and export it back to resolve.  Don't forget to do all the necessary transforms for any additional footage. For example , if you import srgb image, you should transform it from rec709 gamma (if you choose srgb gamma instead, you often get darker shadows) to linear gamma AND from srgb primaries to redwidegamutRGB primaries.

*Not sure how it works in AE. But it works this way in nuke.
Compositing app adds automatic transform from linear gamma to rec709 gamma (usually to srgb, but never use srgb gamma for video  at all). So we need to transform our rec709-ish image after the LUT from rec709 gamma to linear, to compensate this.

Edited December 29, 2019 by Anton Meleshkevich

[Luca Di Gioacchino]

Second what Anton said.  Always work in linear when compositing.  In AE, under Project Settings > Color, check the Linearize Working Space box to work in linear.