feat: make car count follow time profile

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);',