Fixed ambient in few more examples.

examples/webgl_materials_cars_camaro.html

@@ -75,7 +75,7 @@
 
 				// LIGHTS
 
-				var ambient = new THREE.AmbientLight( 0x555555 );
+				var ambient = new THREE.AmbientLight( 0x020202 );
 				scene.add( ambient );
 
 				directionalLight = new THREE.DirectionalLight( 0xffffff );

examples/webgl_materials_cars_parallaxbarrier.html

@@ -169,7 +169,7 @@
 
 				// LIGHTS
 
-				var ambient = new THREE.AmbientLight( 0x555555 );
+				var ambient = new THREE.AmbientLight( 0x050505 );
 				scene.add( ambient );
 
 				directionalLight = new THREE.DirectionalLight( 0xffffff, 2 );