ORIGINAL CONCEALED JOIN EXERCISE

Source A: first48frames of the original courier animation, scaled to768by432
Source B: frames192through239 of the original lamp camera study
Both prepared sources:2seconds at24fps, silent
Assembly: source A then source B,4seconds total,96frames
Cut: before zero-based frame48, at2seconds

Control: direct visible hard cut
Treatment: same control under an authored opaque black rectangle that moves left to right, covers the cut and leaves the frame

Review the visible panel movement and the scene after it clears. Matching black frames at47and48 proves only the selected covered boundary pair. It does not establish a convincing camera move, preserved identity or an imperceptible whole transition.

No camera-recorded occluder, AI generation, voice or editor plugin was used. The scene change is intentional; this is an assembled conventional wipe rather than a genuine uncut recording.