Adds the independent Campaign AR review (docs/research/2026-08-22-campaign-
ar-review.md): architecture, technical correctness, performance, coverage.
Findings F1-F8; F1 (default-path invariance proven only on a 2x2 recording-
device oracle) blocks merge; F2 (10 m/50 m detail fade has no retail anchor);
F3 (the port is retail's two-pass fallback; single-pass stage path
undetermined); F4 (post stack runs in gamma space); F5 (four overclaiming
sentences, one premise error the reviewer owns).
Campaign VM plans the closure: VM0 masked pixel + production perf A/B vs
6c79d35c; VM1 removes the fade (retail attenuates by mips); VM2 one cdb read
of m_caps.bCanDoSinglePassDetailing; VM3 linear-light post stack with a
numerically neutral preset; VM4 truthful docs; VM5 volumetric jitter; VM6
weather-driven foliage wind - procedural-scenery (bit-31 id namespace) cutout
subsets only, three motions (lean/branch/flutter) with gusts and per-tree
phase, shadows share the displacement include; VM7 closeout + merge.
Roadmap gains the Campaign VM pointer beside Campaign AR.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
