Darken side facing away from light

assets/index.html

@@ -117,9 +117,9 @@
         var top3 = project(wx + TILE - GAP/2, wy + GAP/2, h * HEIGHT_UNIT);
         var top4 = project(wx + GAP/2, wy + GAP/2, h * HEIGHT_UNIT);
 
-        var topColor = inShadow ? '#3a5a3a' : '#5a8a5a';
-        var leftColor = inShadow ? '#4a3020' : '#6b4423';
-        var rightColor = inShadow ? '#352010' : '#4a2e18';
+        var topColor = '#5a8a5a';
+        var rightColor = '#6b4423';
+        var leftColor = '#3d2614';
 
         ctx.fillStyle = topColor;
         ctx.beginPath();