EffectComposer

dotscreen

HTML

<script src="http://mrdoob.github.com/three.js/three.min.js"></script>
<script src="https://dl.dropboxusercontent.com/u/3587259/Code/Threejs/OrbitControls.js">
</script>
<script src = "http://mrdoob.github.com/three.js/examples/js/shaders/CopyShader.js"></script>
<script src="http://mrdoob.github.com/three.js/examples/js/shaders/DotScreenShader.js"></script>
<script src="http://mrdoob.github.com/three.js/examples/js/shaders/RGBShiftShader.js"></script>
<script src="http://mrdoob.github.com/three.js/examples/js/postprocessing/EffectComposer.js"></script>
<script src="http://mrdoob.github.com/three.js/examples/js/postprocessing/RenderPass.js"></script>
<script src="http://mrdoob.github.com/three.js/examples/js/postprocessing/MaskPass.js"></script>
<script src="http://mrdoob.github.com/three.js/examples/js/postprocessing/ShaderPass.js"></script>

JavaScript

var camera, scene, renderer, composer;
var object, light;

init();
animate();

function init() {

    renderer = new THREE.WebGLRenderer();
   // renderer.setPixelRatio(window.devicePixelRatio);
    renderer.setSize(window.innerWidth, window.innerHeight);
    renderer.setClearColor (0x888888);
    document.body.appendChild(renderer.domElement);

    camera = new THREE.PerspectiveCamera(70, window.innerWidth / window.innerHeight, 1, 1000);
    camera.position.z = 400;

    scene = new THREE.Scene();
    scene.fog = new THREE.Fog(0x000000, 1, 1000);

    object = new THREE.Object3D();
    scene.add(object);

    var geometry = new THREE.SphereGeometry(1, 4, 4);
    var material = new THREE.MeshPhongMaterial({
        color: 0xffffff,
        shading: THREE.FlatShading
    });

    for (var i = 0; i < 100; i++) {

        var mesh = new THREE.Mesh(geometry, material);
        mesh.position.set(Math.random() - 0.5, Math.random() - 0.5, Math.random() - 0.5).normalize();
        mesh.position.multiplyScalar(Math.random() * 400);
        mesh.rotation.set(Math.random() * 2, Math.random() * 2, Math.random() * 2);
        mesh.scale.x = mesh.scale.y = mesh.scale.z = Math.random() * 50;
        object.add(mesh);
    }

    scene.add(new THREE.AmbientLight(0x222222));

    light = new THREE.DirectionalLight(0xffffff);
    light.position.set(1, 1, 1);
    scene.add(light);

    // postprocessing

    composer = new THREE.EffectComposer(renderer);
    composer.addPass(new THREE.RenderPass(scene, camera));

    var effect = new THREE.ShaderPass(THREE.DotScreenShader);
    effect.uniforms['scale'].value = 2;
    composer.addPass(effect);

    var effect = new THREE.ShaderPass(THREE.RGBShiftShader);
    effect.uniforms['amount'].value = 0.015;
    effect.renderToScreen = true;
    composer.addPass(effect);

    //

    window.addEventListener('resize', onWindowResize, false);
}

function onWindowResize() {

    camera.aspect = window.innerWidth / window.innerHeight;
   ...