fixes controls range in materials modified example

examples/webgl_materials_modified.html

@@ -57,8 +57,8 @@
 				document.body.appendChild( renderer.domElement );
 
 				var controls = new OrbitControls( camera, renderer.domElement );
-				controls.minDistance = 0;
-				controls.maxDistance = 90;
+				controls.minDistance = 10;
+				controls.maxDistance = 50;
 
 				//