incomplete

Native WebGPU Dense Grass

This report separates published implementation state from accepted evidence. Every value below comes from the schema-v2 registry, the emitted source manifest, or promoted same-lab artifacts.

Open demo Owning skill Published source manifest Registry JSON Canonical source

Lab id: webgpu-dense-grass
Kind: Canonical Lab
Owning skill: Procedural Vegetation
Execution: rendering
Three.js: 0.185.1
Source hash: sha256:6203a4de2601015034bba82f5910ca7997bbfe786526d925290f577ac4839111
Published bundle hash: sha256:50d7c1747288c481307cce0b42c584ad6c524d0f2cdc89f462881c6da07ae1ef
Build revision: sha256:6c7881ab73865696d689489de465e1cd67e1f2242d43641279abac777df0479b
Renderer: Not promoted
Backend: Not promoted
Evidence contract: v2
Tracked release bundle: Absent

Claim verdicts

canonicalAcceptanceINSUFFICIENT_EVIDENCE

hardwarePerformanceNOT_CLAIMED

Promoted same-lab media

No same-lab evidence image is promoted for this report. The page intentionally shows status and proof requirements instead of substitute art.

Required capability and runtime proof

Capabilities

native-webgpuincomplete

renderer.backend.isWebGPUBackend after renderer.init

storage-computeincomplete

one static placement compute dispatch per patch

Runtime proof

render-target-readbackincomplete

No runtime evidence is recorded.

storage-ledgerincomplete

LabController.describeResources

spatial-lodincomplete

validation.js quadrant occupancy gate

Capture state

Field	Published value
Primary route	`/demos/webgpu-dense-grass/`
Cameras	`near, design, far`
Seeds	`0x00000001, 0x9e3779b9`
Modes	`final, bounds, density, lod, wind`
Capture time	`Not present in the promoted report data`
Adapter identity	`Not promoted`
Raw readback hashes	`Not promoted`

Fixed routes

Kind	Id	Startup state	Status
scenario	`dense-grass-placement`	`{"scenario":"dense-grass-placement"}`	incomplete
scenario	`dense-grass-wind-and-trampling`	`{"scenario":"dense-grass-wind-and-trampling"}`	incomplete
scenario	`dense-grass-lod-and-impostors`	`{"scenario":"dense-grass-lod-and-impostors"}`	incomplete
scenario	`uniform-density`	`{"scenario":"uniform-density"}`	incomplete
scenario	`mask-a`	`{"scenario":"mask-a"}`	incomplete
scenario	`mask-b`	`{"scenario":"mask-b"}`	incomplete
scenario	`mask-c`	`{"scenario":"mask-c"}`	incomplete
mechanism	`dense-grass-placement`	`{"scenario":"dense-grass-placement","mode":"density"}`	incomplete
mechanism	`dense-grass-wind-and-trampling`	`{"scenario":"dense-grass-wind-and-trampling","mode":"wind"}`	incomplete
mechanism	`dense-grass-lod-and-impostors`	`{"scenario":"dense-grass-lod-and-impostors","mode":"lod"}`	incomplete
tier	`dense/ultra`	`{"tier":"dense/ultra"}`	incomplete
tier	`dense/high`	`{"tier":"dense/high"}`	incomplete
tier	`dense/medium`	`{"tier":"dense/medium"}`	incomplete
tier	`dense/low`	`{"tier":"dense/low"}`	incomplete

Locked tier contracts

dense/ultra · incomplete

{
  "targetClass": "Correctness workload; target performance unmeasured",
  "frameTargetMs": null,
  "resolutionPolicy": {
    "dprCap": {
      "value": 2,
      "unit": "ratio",
      "label": "Authored",
      "source": "dense tier route"
    }
  },
  "mechanismLimits": {
    "patches": {
      "value": 81,
      "unit": "patches",
      "label": "Derived",
      "source": "(2*4+1)^2"
    },
    "bladesPerPatch": {
      "value": 18000,
      "unit": "blades",
      "label": "Authored",
      "source": "denseGrassQualityTiers.ultra"
    }
  },
  "resourceLimits": {
    "bytesPerBlade": {
      "value": 64,
      "unit": "bytes",
      "label": "Derived",
      "source": "four vec4 storage records"
    }
  },
  "degradationFromPrevious": [],
  "preservedInvariants": [
    "native WebGPU",
    "spatially ranked LOD",
    "rooted wind",
    "immutable static storage between streaming events"
  ]
}

dense/high · incomplete

{
  "targetClass": "Exact audited dense-high workload; target performance unmeasured",
  "frameTargetMs": null,
  "resolutionPolicy": {
    "dprCap": {
      "value": 1.5,
      "unit": "ratio",
      "label": "Authored",
      "source": "dense tier route"
    }
  },
  "mechanismLimits": {
    "patches": {
      "value": 49,
      "unit": "patches",
      "label": "Gated",
      "source": "dense-high acceptance contract"
    },
    "bladesPerPatch": {
      "value": 12000,
      "unit": "blades",
      "label": "Gated",
      "source": "dense-high acceptance contract"
    }
  },
  "resourceLimits": {
    "allocatedBlades": {
      "value": 588000,
      "unit": "blades",
      "label": "Derived",
      "source": "49*12000"
    },
    "bytesPerBlade": {
      "value": 64,
      "unit": "bytes",
      "label": "Gated",
      "source": "dense-high acceptance contract"
    },
    "initDispatches": {
      "value": 49,
      "unit": "dispatches",
      "label": "Gated",
      "source": "one per patch"
    }
  },
  "degradationFromPrevious": [
    "reduce patch radius",
    "reduce blades per patch"
  ],
  "preservedInvariants": [
    "native WebGPU",
    "spatially ranked LOD",
    "rooted wind",
    "one representation per visible patch"
  ]
}

dense/medium · incomplete

{
  "targetClass": "Balanced correctness workload; target performance unmeasured",
  "frameTargetMs": null,
  "resolutionPolicy": {
    "dprCap": {
      "value": 1.25,
      "unit": "ratio",
      "label": "Authored",
      "source": "dense tier route"
    }
  },
  "mechanismLimits": {
    "patches": {
      "value": 25,
      "unit": "patches",
      "label": "Derived",
      "source": "(2*2+1)^2"
    },
    "bladesPerPatch": {
      "value": 8000,
      "unit": "blades",
      "label": "Authored",
      "source": "denseGrassQualityTiers.medium"
    }
  },
  "resourceLimits": {
    "bytesPerBlade": {
      "value": 64,
      "unit": "bytes",
      "label": "Derived",
      "source": "four vec4 storage records"
    }
  },
  "degradationFromPrevious": [
    "reduce patch radius",
    "reduce blades per patch",
    "earlier impostors"
  ],
  "preservedInvariants": [
    "native WebGPU",
    "spatially ranked LOD",
    "rooted wind",
    "bounded touch channel"
  ]
}

dense/low · incomplete

{
  "targetClass": "Minimum native-WebGPU dense workload; target performance unmeasured",
  "frameTargetMs": null,
  "resolutionPolicy": {
    "dprCap": {
      "value": 1,
      "unit": "ratio",
      "label": "Authored",
      "source": "dense tier route"
    }
  },
  "mechanismLimits": {
    "patches": {
      "value": 9,
      "unit": "patches",
      "label": "Derived",
      "source": "(2*1+1)^2"
    },
    "bladesPerPatch": {
      "value": 3000,
      "unit": "blades",
      "label": "Authored",
      "source": "denseGrassQualityTiers.low"
    }
  },
  "resourceLimits": {
    "bytesPerBlade": {
      "value": 64,
      "unit": "bytes",
      "label": "Derived",
      "source": "four vec4 storage records"
    }
  },
  "degradationFromPrevious": [
    "reduce patch radius",
    "reduce blades per patch",
    "larger patches",
    "earlier impostors"
  ],
  "preservedInvariants": [
    "native WebGPU",
    "spatially ranked LOD",
    "rooted wind",
    "bounded touch channel"
  ]
}

Limitations

No tracked accepted v2 runtime bundle is published for this source hash.
2 required capability records remain incomplete.
3 required runtime-proof records remain incomplete.
No current-hardware performance claim is published without named-adapter timestamp evidence.