Ticket #563. Light fog alpha tuned to 0.25-0.35 range (was 0.25-0.55), deep fog alpha set to 0.55-0.70 with zone temperature tint from zone_tint_tex (bar=warm #2a1f15, hub=cool #1a1f2e, corridor=neutral #1a1a1a). Two Perlin noise cycles: 8-10s light, 15-20s deep. Zone tint texture now populated per-tile from server zone_id in fog_state.gd with preservation across texture resizes. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>