Decomp + in-game probe (agent-arcanum-probe.log) show the ambient regime
is already retail-faithful (CellManager::ChangePosition 0x004559B0); only
the sun is wrong — acdream gates it per-FRAME, retail per-STAGE
(useSunlight 0x0054d450). Fix = a per-instance indoor flag (reusing
IndoorObjectReceivesTorches, the AP-43 predicate) gating the sun off for
indoor mode-0 objects. No second ambient, UpdateSunFromSky + EnvCellRenderer
unchanged. User pre-approved.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
