How do you create or find IDT?

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#1

Hello everyone, I’m using VEGAS Pro 18 software as my main NLE. VEGAS Pro does support ACES workflow.

But in VEGAS Color space menu, (I think same as Davinci Resolve IDT as well), I can either pic between Slog2 with Sgamut or Slog3 with Sgamut3.cine. There is no any option for me to pick Slog2 with Sgamut3.cine. Same applies to Davinci Resolve too when picking up IDT.

Because I mixed my Gamma & Gamut in my sony picture profile 7, SLog2 with Sgamut3.cine.

I’m new to ACES workflow, and wanted to learn & experiment more with ACES. Thanks!

#2

What camera did you shoot? I don’t think it should be possible to use SLog2 with SGamut3.cine

#3

@llamafilm I’m using Sony a6500. I customize my picture profile 7 to be Slog2 with Sgamut3.cine.
So I was wondering how can I make custom IDT for that.

#4

I don’t know Vegas, but I believe it uses OpenColorIO for its colour management. If you can find the config file it is using, you can modify that in a text editor to create an additional colour space for what you need from the existing components.

Basically you would duplicate the S-Log3 one in config.ocio and change it to use the S-Log2_to_linear.spi1d file instead of S-Log3:

  - !<ColorSpace>
    name: Input - Sony - S-Log3 - S-Gamut3.Cine
    family: Input/Sony
    equalitygroup: ""
    bitdepth: 32f
    description: |
      S-Log3 - S-Gamut3.Cine
      
      ACES Transform ID : IDT.Sony.SLog3_SGamut3.Cine_10i.a1.v1
    isdata: false
    allocation: uniform
    allocationvars: [0, 1]
    to_reference: !<GroupTransform>
      children:
        - !<FileTransform> {src: S-Log3_to_linear.spi1d, interpolation: linear}
        - !<MatrixTransform> {matrix: [0.638789, 0.272351, 0.0888599, 0, -0.00391591, 1.08807, -0.0841573, 0, -0.0299072, -0.0264326, 1.05634, 0, 0, 0, 0, 1]}
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