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LUT use question

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  • LUT use question

    For anyone that understands LUTs better than I:
    Say I shoot SLOG2, and then apply a LUT to get a "close" color grade in rec709 space.
    If I then start working with PCC to tune the color grade, have I lost any original dynamic range by first applying that "get it close" LUT?

    Asked another way, do I loose anything by applying a correction LUT to SLOG footage before I start my PCC color correction?
    Or, must I create my own color correction from scratch in PCC on the original SLOG footage to be able to utilize the full dynamic range of the original clip?

    I hope that makes sense. Thanks
    Edius 10.3 Pro, Intel i7-5820K 3.3GHz, MSI X99s SLI plus MB, 32GB DDR4 mem, Nividia GTX 760, Win10 Pro x64, BM Intensity Shuttle for preview & capture.
    New to Edius - came from Liquid, before that 16mm film. I've been filmmaking since watching ST TOS first-run live on B&W TV

  • #2
    This a good review by ProAV with Alister that goes over LUT's. If you follow through you should find when to use a particular LUT.My understanding is using a particular LUT at the wrong time does limit range.
    Ron Evans

    Threadripper 1920 stock clock 3.7, Gigabyte Designare X399 MB, 32G G.Skill 3200CL14, 500G M.2 NVME OS, 500G EVO 850 temp. 1T EVO 850 render, 16T Source, 2 x 1T NVME, MSI 1080Ti 11G , EVGA 850 G2, LG BLuray Burner, BM IP4K, WIN10 Pro, Shuttle Pro2

    ASUS PB328 monitor, BenQ BL2711U 4K preview monitor, EDIUS X, 9.5 WG, Vegas 18, Resolve Studio 18

    Cameras: GH5S, GH6, FDR-AX100, FDR-AX53, DJI OSMO Pocket, Atomos Ninja V x 2


    • #3
      Yeah, if you add LUT as a first filter (first Node in Davinci) your Waveform will be affected (you won't be able to "pull out" the details). Also, LUT must have Color (chroma) and Brightnes (luma) for proper work. So... I alwys change log to rec from scratch and then (with the next filter - Blend Filter with PCC) I add LUT. You can always back to effect before LUT. But if you want use Log to Rec LUT simply add this after "empty" Combine Filter with PCC, 3-way, YUV Curve in.
      Pawel Chyrowski

      Edius 9 Workgroup

      Writer/Director. Director of Photography. Motion Picture and Sound Editor. Colorist.