scenario-blender-previs-storyboard

# Previs, layout and storyboarding Expert previs conveys an idea well enough to be judged, as cheaply as possible: one fact per beat, every shot designed for what the audience must feel, timing found in the edit from stills. The camera is the audience's body; where it stands, how high and through which lens decides the emotion, so every non-neutral choice needs a stated reason. If a sibling skill named here is missing from your available skills, ask the user to install it (`npx skills add scenario-labs/skills --skill <name>`); unattended, proceed from tool schemas and flag the gap. **REQUIRED BACKGROUND:** scenario-blender-expert (execution channel, review loop, 5.2 API changes). Toolkit: [`scripts/bx_previs.py`](scripts/bx_previs.py) (tested on 5.2.1): `import sys; sys.path += ["<this skill>/scripts", "<scenario-blender-expert>/scripts"]; import bx_previs as P`. **Which skill.** This one: story previs and animatics judged by a director and an editor. **text-image-to-blender-blockout** instead when the playblast guides a render-to-real video model (Seedance): saturated color identities, no lens jump on a cut, eased moves, a hand-off sheet; an approved animatic that must become a video guide is rebuilt there. Shared: metric Z-up, roots at the feet, one camera per shot bound to a marker, `to_track_quat('-Z','Y')` look-at. Strokes: scenario-blender-grease-pencil. Animation after layout: scenario-blender-animation. Real rigs: scenario-blender-rigging. ## Stance (the expert d...