feat: make car count follow time profile

config.js

@@ -529,7 +529,7 @@ window.CONFIG = {
         spreadKm: 45,             // gaussian sigma around the motorway network
         spreadFloor: 0.30,        // share that far side roads keep
         speed: 1.0,               // flow speed multiplier
-        density: 0.01,            // vehicle density multiplier
+        density: 0.04,            // vehicle density multiplier
         brightness: 1.0,          // vehicle light intensity
         motorwayDensity: 0.95,    // share of the density budget on motorways/trunk
         sideDensity: 0.35,        // share of the density budget on primary/secondary/tertiary
@@ -551,7 +551,7 @@ window.CONFIG = {
             sundayEveningPeak: 18.5,
             sundayEveningWidth: 1.8,
             sundayEveningGain: 0.85, // commuter return traffic
-            nightReduction: 0.70  // deep-night traffic reduced to 30 %
+            nightReduction: 0.85  // deep-night traffic reduced to 15 %
             // timeProfile: { enabled: false }
             // timeProfile: { morningGain: 0.8, eveningGain: 1.0, nightReduction: 0.85 }
         }

vendor/clouds3d.js

@@ -4679,7 +4679,7 @@ var CARP_FRAG_SRC = [
         // and rests again - no hard popping, no fixed pattern',
         'float dens = uDens * vDens;',
         'float h = hash1(vSeed * 7.31 + 17.3);',
-        'float vis = smoothstep(h - 0.16, h + 0.16, dens);',
+        'float vis = smoothstep(h - 0.002, h + 0.002, dens);',
         'if (vis <= 0.0) discard;',
         'float life = 700.0 + 2400.0 * hash1(vSeed * 0.371 + 9.4);',
         'float rest = 60.0 + 900.0 * hash1(vSeed * 0.617 + 3.2);',