Kredi Lab Presets — Location & File Format

{
  "format": "kredilab.scene",          // file magic — always exactly this
  "version": 2,                        // format version — required, always 2

  // ── Metadata ──────────────────────────────────────────────────────
  "name": "Kodak Warm Evening",        // gallery card title
  "category": "Film",                  // optional, free-form
  "author": "Jon Snow",                // optional credit
  "created": "2026-07-17T18:30:00Z",   // optional ISO-8601 timestamp

  // Card image: EITHER an embedded PNG (written at save time, 640 px
  // wide) OR a path, absolute or relative to the preset file (640×360
  // recommended). If both are present the embedded PNG wins.
  "thumbnail": "<base64 PNG>",
  "thumbnailPath": "thumbs/warm-evening.png",

  // ── Colour management, by NAME (not menu index) ──────────────────
  "idt": "S-Log3 / S-Gamut3.Cine",     // omit → keep the clip's input transform
  "lmt": "Kodak 2383",                 // film stock; omit → None
  "lmtBypass": true,                   // only when the film-stock row is
                                       // switched off (selection kept)
  "odt": "SDR Rec.709 (BT.1886)",

  // ── Embedded custom LUT (only when saved with "Embed LUT") ───────
  // When present, the embedded LUT wins and creativeLook.selection
  // is omitted.
  "lut": "<base64 .cube contents>",
  "lutFileName": "warm_evening.cube",

  // ── The grade itself ──────────────────────────────────────────────
  "stages": { … }                      // see below
}

"stages": {

  "whiteBalance": {
    "temperature": 5600,           // Kelvin
    "tint": 0.05
  },

  "base": {
    "exposure": 0.35,              // EV
    "contrast": 0.10,
    "pivot": 0.45,
    "highlights": -0.15,
    "shadows": 0.05,
    "whites": 0.0,
    "blacks": 0.0,
    "saturation": 0.10,
    "vibrance": 0.05
  },

  "tone": {
    "shadows": 12, "darks": 0,     // parametric range adjustments
    "lights": -5, "highlights": 0,
    "split1": 0.25,                // range split points, 0–1 positions
    "split2": 0.50,                // between the four zones
    "split3": 0.75,
    // Freeform curves: control points as [x, y] pairs, both axes
    // 0–255, x ascending. A missing channel is identity. The curve
    // through the points is a natural cubic spline.
    "curves": {
      "luma": [[0, 0], [62, 70], [255, 255]],
      "red":  [[0, 0], [255, 255]]
    }
  },

  "colorWheels": {
    // Four wheels: lift, gamma, gain, global — each with the same keys.
    "liftRed": 0.02,               // colour offset
    "liftGreen": 0.00,
    "liftBlue": -0.02,
    "liftMaster": 0.05,            // level
    "liftBypass": true,            // wheel disabled

    "shadowsRange": 0.33,          // zone falloff
    "highlightsRange": 0.66,
    "shadowsSat": 1.0,             // per-zone saturation (0–2, 1 = neutral)
    "midsSat": 1.0,
    "highsSat": 1.0
  },

  "selectiveColor": {
    // Eight vectors: red, orange, yellow, green, cyan, blue, violet,
    // magenta — each with Hue / Sat / Val.
    "redHue": 0.05,                // hue shift (−0.5…0.5)
    "redSat": 0.20,                // saturation (−1…2)
    "redVal": 0.00                 // level (−0.5…0.5)
  },

  "cameraMatrix": {                // 3x3 channel mixer (see note below)
    // Nine coefficients, named <output><input>. matrixRB is how much of the
    // ORIGINAL BLUE ends up in the FINAL RED. Absent keys are identity, so an
    // untouched stage writes nothing at all.
    "matrixRR": 0.63, "matrixRG": 0.00, "matrixRB": 0.37,
    "matrixGR": 0.00, "matrixGG": 0.72, "matrixGB": 0.28,
    "matrixBR": 0.00, "matrixBG": 0.00, "matrixBB": 1.00,

    "matrixBasis": "Rec.709",      // gamut the editor draws against, BY NAME:
                                   // "Rec.709" | "Rec.2020" | "DCI-P3" | "ACEScg"
    "preserveNeutrals": 1          // 1 = rows constrained to sum to 1, so a
                                   // neutral grey stays neutral
  },

  "creativeLook": {
    "strength": 0.8,               // LUT mix amount
    "tone": 0.0,                   // tone trim around the LUT
    "chroma": 0.0,                 // chroma trim around the LUT

    // ONE selection field. Forms:
    //   "none"                — no look
    //   "bundled:Looks_1" … "bundled:Looks_4"
    //   "/path/to/my.cube"    — custom LUT by absolute path
    //   "sealed:<hash>"       — LUT from a sealed collection
    //                           (resolves in memory — never a file)
    // Omitted when the preset embeds a LUT (top-level "lut" wins).
    "selection": "bundled:Looks_2",

    "hdrSafe": false,              // HDR-safe LUT application (default true)
    "lutInput": "Rec.2020 PQ",     // LUT input/output colour spaces by
    "lutOutput": "Rec.709 Gamma"   // menu name — see below
  },

  "colorDensity": {
    "printerGang": false,          // printer lights R/G/B gang (default true)
    "printerRed": 25,              // printer light offsets
    "printerGreen": 25,
    "printerBlue": 25,
    "gammaAll": 1.0,               // density gammas
    "gammaCyan": 1.0,
    "gammaMagenta": 1.0,
    "gammaYellow": 1.0,
    "shadowProtect": 0.0,
    "highlightProtect": 0.0,
    "warmCool": 0.0                // density bias: − cooler, + warmer
  },

  "clarity": {
    "shadows": 0.0,                // range amounts
    "highlights": 0.0,
    "shadowDetail": 0.0,
    "highlightDetail": 0.0,
    "spatialScale": 0.5
  },

  "skinRefine": {
    "amount": 0.5, "mix": 0.5,
    "detail": 0.5, "contrast": 0.0,
    "hueCenter": 25,               // skin hue selection
    "hueRange": 20,
    "darkThreshold": 0.1,
    "lightThreshold": 0.9,
    "satLow": 0.1, "satHigh": 0.9,
    "toneSat": 0.0, "toneShift": 0.0
  },

  "sharpness": {
    "amount": 0.3
  },

  "diffusion": {
    "style": "Balanced",           // by menu name: Subtle, Fine Detail,
                                   // Balanced, Medium, Delicate, Compact,
                                   // Dreamy, Natural, Whisper
    "amount": 0.4,
    "threshold": 0.7,
    "spread": 0.5,
    "highlight": 0.5,
    "midtone": 0.2,
    "saturation": 0.5,
    "tintAmount": 0.0,             // glow tint
    "tintHue": 40                  // hue in degrees
  },

  "grain": {
    "amount": 50,
    "size": 50,
    "color": 30,                   // chroma of grain
    "response": 50,
    "filmResolution": 100,         // 100 = sharp
    "highlight": 40,
    "shadowLift": 0,
    "midCenter": 20,
    "midWidth": 30
  },

  "vignette": {
    "color": [1.0, 0.95, 0.9],     // vignette tint, RGB 0–1
    "amount": 0.3,
    "exposure": -0.5,
    "midpoint": 0.5,
    "roundness": 0.0,
    "feather": 0.5
  }
}

{
  "format": "klgrain",
  "version": 1,
  "name": "16mm",
  "values": {
    "amount": 20.588,
    "size": 2.015,
    "color": 0,
    "response": 28.757,
    "shadowLift": 70.192,
    "midtone": 0,
    "midWidth": 10,
    "highlight": 79.512,
    "filmFormat": "16mm",
    "filmResolution": 78.223
  }
}