# WBV2-P2-004 status

- task: `WBV2-P2-004`
- parent: `WBV2-P2-003`
- parity: `VIEWPORT.MAIN_OFFSCREEN`
- implementationClass: `LOCAL_BOUNDED`
- status: `done`
- fixture: `tests/files/web/generated/WBV2-P2-004-VIEWPORT.MAIN_OFFSCREEN.blend`

## Evidence

- Desktop and WASM load the same cube/camera SceneIR and preserve node, mesh, camera and scene data across save/reopen.
- Chromium production dist renders nonblank pixels through both main-thread WebGL and Offscreen worker paths.
- Selection and camera state are identical across backends; main-thread `WEBGL_lose_context` recovery returns ready with nonblank readback, and Offscreen disposal/reopen is exact.
- Malformed blend input is rejected without mutating Main.

## Commands

- `build_blender_5.2.0/bin/blender -b --factory-startup --python tools/web/generated/WBV2-P2-004.py -- tests/files/web/generated/WBV2-P2-004-VIEWPORT.MAIN_OFFSCREEN.blend`
- `npm --prefix web run test:generated-gap -- --task WBV2-P2-004`
- `node tools/web/check-generated-gap.mjs --task WBV2-P2-004`
- `node tools/web/check-task-context.mjs --task WBV2-P2-004 --write`

## Handoff

- nextTask: `WBV2-P2-005`
- queue mutation: allowed after manifest and parent hash validation