weather: add wet road glow and light halos

config.js

@@ -143,10 +143,18 @@ window.CONFIG = {
             minDelayS: 8,         // minimum delay between storm flashes
             maxDelayS: 45,        // maximum delay between storm flashes
             doubleFlash: true     // some flashes flicker twice
+        },
+        wetRoads: {
+            enabled: true,
+            dryMinutes: 30,       // roads dry out after this many dry minutes
+            roadGain: 0.8,        // extra road-ribbon glow when wet
+            lightGain: 0.35       // extra halo on vehicle lights when wet
         }
         // weatherEffects: { enabled: false }
         // weatherEffects: { rain: { maxAlpha: 0.55, speed: 1.4 }, snow: { enabled: false } }
         // weatherEffects: { lightning: { gain: 2.0, minDelayS: 3, maxDelayS: 12 } }
+        // weatherEffects: { wetRoads: { enabled: false } }
+        // weatherEffects: { wetRoads: { dryMinutes: 10, roadGain: 1.4, lightGain: 0.7 } }
     },
 
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