incomplete

WebGPU FFT Ocean

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 Promoted evidence summary Canonical source

Lab id: webgpu-fft-ocean
Kind: Canonical Lab
Owning skill: Spectral Ocean
Execution: rendering
Three.js: 0.185.1
Source hash: sha256:d8bfba57799a06f5fb8bdaf78eb70bb58a6de29a5de8f98724aa03bf85bda91a
Published bundle hash: sha256:fea09ca36e3de2839b52f25a9215f7e4110136c32152bf2eecbbf48827961c58
Build revision: sha256:d929feed6bb69df4ba0bca7a58c723f6c257d003c20d1e9417d25ccb25e4ecf9
Renderer: WebGPURenderer
Backend: WebGPUBackend
Evidence contract: v2
Tracked release bundle: Absent

Claim verdicts

visualCorrectnessPASS

mechanismCorrectnessPASS

performanceComplianceINSUFFICIENT_EVIDENCE

gpuAttributionINSUFFICIENT_EVIDENCE

lifecycleStabilityINSUFFICIENT_EVIDENCE

Promoted same-lab media

WebGPU FFT Ocean: Final ocean presentation after spectral FFT path. — **Final ocean presentation after spectral FFT path.**inspected-runtime-evidence-preview · sha256:61b5f55069e727447b93646505bc166980167a7610b2e91f62b370e3298900d1

WebGPU FFT Ocean: No-post ocean presentation baseline. — **No-post ocean presentation baseline.**inspected-runtime-evidence-preview · sha256:b15f2c167ec727a7976509ba41b835c322f9602f46537195d94837cb016d5d6a

WebGPU FFT Ocean: Diagnostics mosaic mode readback. — **Diagnostics mosaic mode readback.**inspected-runtime-evidence-preview · sha256:ee1037d9cde12f1b7c87165d7069c337de4c35eb3493e2d4aee1dc86fdda497c

WebGPU FFT Ocean: Spectrum/FFT mechanism diagnostic. — **Spectrum/FFT mechanism diagnostic.**inspected-runtime-evidence-preview · sha256:e07c08dab1f7e6591c3ca41d2ba5b6c14bd46561cddc969e5a66dc219f4009ca

WebGPU FFT Ocean: Whitecaps and foam mechanism diagnostic. — **Whitecaps and foam mechanism diagnostic.**inspected-runtime-evidence-preview · sha256:d14466e48ec6b109efa700ee43e1f5795c2ef0b90f39e0f199164dd1dcf1836d

WebGPU FFT Ocean: Underwater optics camera diagnostic. — **Underwater optics camera diagnostic.**inspected-runtime-evidence-preview · sha256:cfc04295caf4b4cd78714202e891e926e53d195c451f7176b90b77d8bbfb4a1d

WebGPU FFT Ocean: Near camera ocean frame. — **Near camera ocean frame.**inspected-runtime-evidence-preview · sha256:5db2d34f7ae73354560b49a53c709a148418f6e7f11d959916e510a537f6ad93

WebGPU FFT Ocean: Stress seed final ocean frame. — **Stress seed final ocean frame.**inspected-runtime-evidence-preview · sha256:923294ea328ab65d5861de468238720f886bef420caeb58b6c8bf380c27460a9

Required capability and runtime proof

Capabilities

native-webgpuaccepted

Native browser capture-session: nativeWebGPU/backend WebGPU after renderer.init(); GPU FFT fixture suite pass.

minimum-four-storage-texturesaccepted

Ocean capabilities gate requires adapter maxStorageTexturesPerShaderStage >= 4; capture initializes full cascade storage layout.

Runtime proof

renderer-initaccepted

createWebGPUFftOcean after await renderer.init(); capture-session records initialized native WebGPU.

backend-is-webgpuaccepted

metrics.backend=WebGPU / isWebGPUBackend=true in capture-session and renderer-info.json.

mechanism-reachableaccepted

Mechanism debug modes spectrum-fft/jacobian/foam/underwater captured as distinct PNG readbacks.

render-or-compute-workaccepted

GPU FFT fixture suite and per-frame compute dispatches recorded; mechanism-metrics.gpuReadback.pass=true.

aligned-readbackaccepted

Integer 256-byte-aligned RT transport-readbacks for final/diagnostics/seed/temporal captures.

complete-2d-fft-readbackaccepted

runBrowserGpuReadbackFixtures complete-2d-fft suite pass (textureLoad-based storage stages) recorded in mechanism-metrics.json.

per-cascade-surface-and-foam-readbackaccepted

whitecaps-and-foam.png + temporal foam frames and cascade surface materialCascades ledger from native capture.

pages-source-hashaccepted

evidence-manifest.sourceHash matches demo-registry sourceHash for this capture session.

Capture state

Field	Published value
Primary route	`/demos/webgpu-fft-ocean/`
Cameras	`near, design, far, underwater`
Seeds	`0x00000001, 0x9e3779b9`
Modes	`final, height, displacement, slopes, jacobian, foam, normal, spectrum-fft, cascade-bands, underwater-optics, cpu-query, no-post, diagnostics`
Capture time	`Not present in the promoted report data`
Adapter identity	`Not promoted`
Raw readback hashes	`Not present in the promoted preview summary`

Fixed routes

Kind	Id	Startup state	Status
scenario	`directional-sea`	`{"mode":"final","camera":"design"}`	incomplete
mechanism	`spectrum-and-fft`	`{"mode":"spectrum-fft","camera":"design"}`	incomplete
mechanism	`dispersion-and-cascades`	`{"mode":"cascade-bands","camera":"design"}`	incomplete
mechanism	`derivatives-and-jacobian`	`{"mode":"jacobian","camera":"near"}`	incomplete
mechanism	`whitecaps-and-foam`	`{"mode":"foam","camera":"near"}`	incomplete
mechanism	`above-and-below-surface`	`{"mode":"underwater-optics","camera":"underwater"}`	incomplete
mechanism	`cpu-query-parity`	`{"mode":"cpu-query","camera":"design"}`	incomplete
tier	`ultra`	`{"tier":"ultra"}`	incomplete
tier	`high`	`{"tier":"high"}`	incomplete
tier	`medium`	`{"tier":"medium"}`	incomplete
tier	`low`	`{"tier":"low"}`	incomplete

Locked tier contracts

ultra · incomplete

{
  "targetClass": "unmeasured-current-adapter",
  "frameTargetMs": null,
  "resolutionPolicy": {
    "fftResolution": 512,
    "dpr": 1
  },
  "mechanismLimits": {
    "cascadeCount": 3,
    "packedComplexTransformCount": 4
  },
  "resourceLimits": {
    "authoredStorageBudgetMiB": 104,
    "derivedStorageBytes": 106954752
  },
  "degradationFromPrevious": [],
  "preservedInvariants": [
    "dimensional spectrum",
    "Hermitian evolution",
    "explicit inverse-transform convention",
    "resolved-band geometry/normal parity",
    "native-resolution per-cascade foam history"
  ]
}

high · incomplete

{
  "targetClass": "unmeasured-current-adapter",
  "frameTargetMs": null,
  "resolutionPolicy": {
    "fftResolution": 256,
    "dpr": 1
  },
  "mechanismLimits": {
    "cascadeCount": 3,
    "packedComplexTransformCount": 4
  },
  "resourceLimits": {
    "authoredStorageBudgetMiB": 28,
    "derivedStorageBytes": 26738688
  },
  "degradationFromPrevious": [
    "FFT resolution 512 to 256"
  ],
  "preservedInvariants": [
    "dimensional spectrum",
    "Hermitian evolution",
    "explicit inverse-transform convention",
    "resolved-band geometry/normal parity",
    "native-resolution per-cascade foam history"
  ]
}

medium · incomplete

{
  "targetClass": "unmeasured-current-adapter",
  "frameTargetMs": null,
  "resolutionPolicy": {
    "fftResolution": 256,
    "dpr": 1
  },
  "mechanismLimits": {
    "cascadeCount": 2,
    "packedComplexTransformCount": 4
  },
  "resourceLimits": {
    "authoredStorageBudgetMiB": 22,
    "derivedStorageBytes": 17825792
  },
  "degradationFromPrevious": [
    "cascade count 3 to 2"
  ],
  "preservedInvariants": [
    "dimensional spectrum",
    "Hermitian evolution",
    "explicit inverse-transform convention",
    "resolved-band geometry/normal parity",
    "native-resolution per-cascade foam history"
  ]
}

low · incomplete

{
  "targetClass": "unmeasured-current-adapter",
  "frameTargetMs": null,
  "resolutionPolicy": {
    "fftResolution": 128,
    "dpr": 1
  },
  "mechanismLimits": {
    "cascadeCount": 1,
    "packedComplexTransformCount": 4
  },
  "resourceLimits": {
    "authoredStorageBudgetMiB": 8,
    "derivedStorageBytes": 2228224
  },
  "degradationFromPrevious": [
    "FFT resolution 256 to 128",
    "cascade count 2 to 1"
  ],
  "preservedInvariants": [
    "dimensional spectrum",
    "Hermitian evolution",
    "explicit inverse-transform convention",
    "resolved-band geometry/normal parity",
    "native-resolution per-cascade foam history"
  ]
}

Limitations

Native WebGPU capture proves complete 2D FFT fixture readbacks, cascade surface modes, and foam temporal frames.
Named-adapter GPU timestamps, lifecycle soak, and release-bundle acceptance remain residual.