function onDocumentMouseDown( event ) {

                event.preventDefault();

                document.addEventListener( 'mousemove', onDocumentMouseMove, false );
                document.addEventListener( 'mouseup', onDocumentMouseUp, false );
                document.addEventListener( 'mouseout', onDocumentMouseOut, false );

                mouseXOnMouseDown = event.clientX - windowHalfX;
                targetRotationOnMouseDown = targetRotation;

                // position of mouse + screen calc
                var vector = new THREE.Vector3( ( event.clientX / window.innerWidth ) * 2 - 1, - ( event.clientY / window.innerHeight ) * 2 + 1, 0.5 );
                projector.unprojectVector( vector, camera );

                // create a ray from the camera thru the vector
                var ray = new THREE.Ray( camera.position, vector.subSelf( camera.position ).normalize() );

                // array of intersecting object (front to back)
                var intersects = ray.intersectObjects( objects );

                // are we hitting something?
                if ( intersects.length > 0 ) {

                    // first intersection should be it..
                    //intersects[ 0 ].object.material.color.setHex( Math.random() * 0xffffff | 0x80000000 );
                    //intersects[ 0 ].face.material[ 0 ].color.setHex( Math.random() * 0xffffff | 0x80000000 );
                    //intersects[ 0 ].face.materialIndex = Math.floor(Math.random() * materials.length);
                    //intersects[ 0 ].face.color.setHex( Math.random() * 0xffffff );
                    //intersects[ 0 ].object.material.color.setHex( Math.random() * 0xffffff );

                    console.log("Intersect[0]: "+intersects[0].object);

                    // tell me face index
                    console.log("Face index: "+intersects[0].faceIndex);

                    // gimme face as THREE.Face3/4 object
                    console.log(intersects[0].face);

                    // face color
                    // the face's indices are labeled with these characters
                    var faceIndices = ['a', 'b', 'c', 'd'];

                    var face = geometry1.faces[intersects[0].faceIndex];

                    // determine if face is a tri or a quad
                    var numberOfSides = ( face instanceof THREE.Face3 ) ? 3 : 4;

                    // assign color to each vertex of current face
                    for( var j = 0; j < numberOfSides; j++ )
                    {
                        var vertexIndex = face[ faceIndices[ j ] ];
                        // initialize color variable
                        var color = new THREE.Color( 0xffffff );
                        color.setRGB( Math.random(), 0, 0 );
                        face.vertexColors[ j ] = color;
                    }

                    var material1 = new THREE.MeshBasicMaterial( {
                        color: Math.random() * 0xffffff,
                        shading: THREE.FlatShading,
                        vertexColors: THREE.VertexColors
                    });

                    var directionalLight = new THREE.DirectionalLight(0xEEEEEE);
                    directionalLight.position.set(10, 1, 1).normalize();
                    scene.add(directionalLight);

                    var cube = new THREE.Mesh(new THREE.CubeGeometry(50, 50, 50,1,1,1), material1);
                    cube.dynamic = true;
                    scene.add(cube);

                    // create a particle on hit position
                    var particle = new THREE.Particle( particleMaterial );
                    //var particle = new THREE.Particle(new THREE.MeshLambertMaterial( { color: 0x2D303D, wireframe: false, shading: THREE.FlatShading } ));
                    particle.position = intersects[ 0 ].point;
                    particle.scale.x = particle.scale.y = 8;
                    scene.add( particle );
                }

                // Parse all the faces
                /*for ( var i in intersects ) {
                    intersects[ i ].face.materialIndex = Math.floor(Math.random() * materials.length);
                }*/
            }