# V384E128 analytic outward elbow branch QA

No AI image generation.

## Verdict

**V384E128 = PASS as Node/probe + actual-FBX visual QA candidate.**

This is not yet a final shaded Chromium mesh lock; shaded mesh render is still pending.

## What changed

- Base kept: V383 leg geometry, V382 lower sole-edge snap, V374/V373 front-shin snap.
- Runtime change: after clavicle reach to the same wrist target, upperarm/forearm are solved analytically through the outward elbow branch.
- No new snap points.
- No figure-four-specific solver branch.

## Node grip QA

| Peak | Generic grip | Sole | Shin |
|---|---:|---:|---:|
| right | PASS | PASS | PASS |
| left | PASS | PASS | PASS |

## Elbow branch evidence

| Peak | Contact | Side | old branch dot | new branch dot | snap err |
|---|---|---:|---:|---:|---:|
| right | foot_underside_sole | L | -0.94664 | 1 | 0.0 mm |
| right | front_lower_shin_above_ankle | R | -0.9976 | 1 | 5.8 mm |
| left | foot_underside_sole | R | -0.92432 | 1 | 0.0 mm |
| left | front_lower_shin_above_ankle | L | -0.99127 | 1 | 0.0 mm |

## Visual QA

Generated deterministic actual-FBX visual QA from the real Nex rig/skinned vertices:

- `/mnt/data/V384E128_ACTUAL_NEX_FBX_VISUAL_QA_FRONT_SIDE_ZOOM.png`

## Limit

This visual QA is actual FBX/skinned-vertex projection, not a shaded mesh screenshot. It is enough to validate the elbow branch direction and hand/target relation, but not final presentation quality.