Opus narrow re-review of 51178f7c: APPROVE. Residuals closed: the AR plan
no longer says '<=1 LSB' unqualified (99.99% of pixels; 95 foliage-
silhouette pixels up to 73 LSB, 58 isolated); the campaign doc says the
same; AtmosphericColorPipelineTests now read the SHIPPED exposure/vignette
defaults from BuiltInAtmosphericRenderPack.Descriptor and the graph's named
DefaultVignetteStrengthFallback instead of literals.
Measured for the gate (offline Holtburg hillside, High defaults vs pack
off): mean luminance -17% noon, -44% dusk, p95 unchanged, clip 0.06% both;
neutral High vs pack off: 110,561 px at |d|=1, 95 at >=5 (foliage edges).
Evidence images under docs/research/evidence/vm3/.
#422 filed: one High-default offline capture exited with
STATUS_HEAP_CORRUPTION after a clean managed shutdown; 1 in 8 runs, never
under validation layers. VM7 gate item.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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