Revisiting the framing layer turned up that it was not reaching four of the
forty-two scenes, and that none of its gates could have told us.
Those gates check the PLAN — cue sizes, the distribution of shot sizes across
a population, headroom, seek determinism — and a plan that never reaches the
image passes every one of them. Rendered at wide, normal and close, Scan
Tear, Pylon Grid, Pitch Shatter and the 3D Particle Field came back
byte-identical at every size.
The cause was a category error in the first implementation. Framing was
applied inside sigCamera, which is gated on the `camera` personality trait —
so a scene that declined the track's drift and sway silently declined the
shot size as well. That gating is right for a TRAIT and wrong for framing,
which is not one: framing is where the camera is standing for this shot, and
no scene should be exempt from it because of an unrelated art-direction
decision.
- Framing now lives in the shader epilogue, applied to the coordinate every
fragment scene is handed, so honouring it is not optional. uv is left
unframed on purpose: it is screen space, and prev() and sigGrain belong to
the output image rather than to the scene being filmed.
- Scan Tear and Pitch Shatter build their image from uv deliberately — a
signal artefact happens to the signal, not to the world behind it. They now
slice on raw uv and build the field they displace from a new framedUv(p),
so the tear stays locked to the frame while the imagery behind it is filmed
wide or close.
- Particle Field receives framing in update() and honours it as a camera
dolly, which is what framing literally is when a layer has a real camera.
Distance divided by scale, matching the fragment path where the coordinate
is divided by it.
New gate renders instead of inspecting: 42 of 42 scenes now respond to
framing, weakest Ridge Terrain at 0.22 of its own brightness, against a 0.05
floor. Also drops a stale comment on Layer.setFraming that still claimed
sigCamera applied it.
105/105 checks pass including the slow set.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
