{
  "id": "feedback-highlight-accumulator",
  "name": "Feedback Highlight Accumulator",
  "description": "Demonstrates shader-local feedback by storing a rolling 4-frame per-pixel highlight history in RGBA and displaying only the newest 3 frames. The highlight selection is an approximation based on a luminance threshold rather than an exact percentile reduction.",
  "category": "Feedback",
  "entryPoint": "buildHistory",
  "passes": [
    {
      "id": "history",
      "source": "shader.slang",
      "entryPoint": "buildHistory",
      "output": "historyBuffer"
    },
    {
      "id": "display",
      "source": "shader.slang",
      "entryPoint": "displayHistory",
      "inputs": [
        "historyBuffer"
      ],
      "output": "layerOutput"
    }
  ],
  "feedback": {
    "enabled": true,
    "writePass": "history"
  },
  "parameters": [
    {
      "id": "highlightThreshold",
      "label": "Highlight Threshold",
      "type": "float",
      "default": 0.92,
      "min": 0.5,
      "max": 1.5,
      "step": 0.001,
      "description": "Approximate cutoff for the brightest parts of the frame."
    },
    {
      "id": "softness",
      "label": "Threshold Softness",
      "type": "float",
      "default": 0.05,
      "min": 0.001,
      "max": 0.25,
      "step": 0.001,
      "description": "Softens the threshold so near-highlights can contribute gradually."
    },
    {
      "id": "accumulateAmount",
      "label": "Contribution Amount",
      "type": "float",
      "default": 0.6,
      "min": 0.0,
      "max": 2.0,
      "step": 0.001,
      "description": "Strength of each frame's highlight contribution before it is shifted into the rolling history."
    },
    {
      "id": "displayGain",
      "label": "Display Gain",
      "type": "float",
      "default": 2.5,
      "min": 0.0,
      "max": 8.0,
      "step": 0.01,
      "description": "Brightness applied to the sum of the most recent three stored highlight samples."
    },
    {
      "id": "baseMix",
      "label": "Base Mix",
      "type": "float",
      "default": 0.25,
      "min": 0.0,
      "max": 1.0,
      "step": 0.01,
      "description": "Amount of the live source image kept under the recent highlight history display."
    }
  ]
}