The static world caster rebuilds only on 16 yd of camera drift. The refresh that invalidates it
when streamed geometry arrives lived in the volumetric-fog plugin and was gated on that cvar, so
with volumetricFog 0 a standing camera never picked up trees and doodads that streamed in late.
The refresh now lives in world_shadow.rs and is gated on worldShadows only (Classic unaffected).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
