📷 / P: pause if playing, scene3d.setHelpersVisible(false) + one scene3d
update so the per-video rigs honor the flag, then render ONE frame at 3840px
wide (aspect preserved, pixelRatio 1) by temporarily resizing the live
renderer, snapshot via canvas.toBlob in the same task, download
festival4d-photo.png, and restore pixelRatio/size/camera.aspect/helpers/play
state (try/finally). Splat: DropInViewer is a scene child and renders with
the same call — no branch; live splat verification deferred to coordinator.
Live-verified: PNG 3840x3093 (aspect 1.2416 preserved), zero helpers in the
captured image, full restore incl. play state (plan/status/lane-F.md).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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