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HTML 

              
                <script id="fragment-shader" type="x-shader/x-fragment">
  #define PI 3.1415926535897932384626433832795
    
  uniform vec2 dims;
  uniform float time;
  uniform float zNear, zFar;
  uniform sampler2D depthMap;
  
  varying vec2 _uv;
  vec2 u_k = vec2(20.0);
  
  // Source: http://www.bidouille.org/prog/plasma
  float plasma() { 
    float v = 0.0;
    vec2 c = _uv * u_k - u_k/2.0;
    v += sin((c.x+time));
    v += sin((c.y+time)/2.0);
    v += sin((c.x+c.y+time)/2.0);
    c += u_k/2.0 * vec2(sin(time/3.0), cos(time/2.0));
    v += sin(sqrt(c.x*c.x+c.y*c.y+1.0)+time);
    v = v/2.0;
    return sin(PI*v) * 0.5 + 0.5;
  }
  
  void main() {
    float solidsDepth = texture2D(depthMap, gl_FragCoord.xy / dims).r;
  
    float solidsDiff = 1.0 - smoothstep(zNear, zFar, gl_FragCoord.z / gl_FragCoord.w) - solidsDepth;
  
    float alpha = 0.1 * plasma();

    alpha += 0.3 + max(0.0, 1.0 - log(100.0 * (solidsDiff - 0.005) + 1.0));
  
    vec2 vignette = 2.0 * _uv - 1.0;
    alpha += 0.3 * (vignette.x * vignette.x + vignette.y * vignette.y);
  
    gl_FragColor = vec4(vec3(1.0), alpha);
  }
</script>

<script id="vertex-shader" type="x-shader/x-vertex">
  varying vec2 _uv;
  
  void main() {
    _uv = uv;
    gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);
  }
</script>
!

CSS 

              
                * {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}
!

JS 

              
                scene = new THREE.Scene!
solids = new THREE.Scene!

const z-near = 1
const z-far  = 1000

THREE.ImageUtils.cross-origin = ''
crate-texture = THREE.ImageUtils.load-texture 'http://crossorigin.me/http://i.imgur.com/CnkTvAG.gif'

box = new THREE.Mesh do
  new THREE.BoxGeometry 100, 100, 100
  new THREE.MeshBasicMaterial map: crate-texture
box.rotation.y = 0.25 * Math.PI
scene.add box

box.clone!
  ..material = new THREE.MeshDepthMaterial!
  solids.add ..

box = new THREE.Mesh do
  new THREE.BoxGeometry 100, 100, 100
  new THREE.MeshBasicMaterial map: crate-texture
box
  ..rotation
    ..x = 0.25 * Math.PI
    ..z = 0.2 * Math.PI
  ..position.x = -100
scene.add box

box.clone!
  ..material = new THREE.MeshDepthMaterial!
  solids.add ..

depth-map = new THREE.WebGLRenderTarget window.inner-width, window.inner-height, min-filter: THREE.LinearFilter, mag-filter: THREE.NearestFilter, format: THREE.RGBFormat

time-uniform =
  type: \f
  value: 0.0

dims-uniform =
  type: \v2
  value: new THREE.Vector2 window.inner-width, window.inner-height

shield = new THREE.Mesh do
  new THREE.PlaneGeometry 200, 200
  new THREE.ShaderMaterial do
    transparent: true
    uniforms:
      depth-map:
        type: \t
        value: depth-map
      dims: dims-uniform
      time: time-uniform
      z-near:
        type: \f
        value: z-near
      z-far:
        type: \f
        value: z-far
    vertex-shader: document.getElementById \vertex-shader .text-content
    fragment-shader: document.getElementById \fragment-shader .text-content
shield.position
  ..x = -5
  ..y = -5
  ..z = 50
scene.add shield

camera = new THREE.PerspectiveCamera 70, window.inner-width / window.inner-height, z-near, z-far
  ..position
    ..x = -100
    ..y = 100
    ..z = 400
  ..rotation
    ..x = -0.1 * Math.PI
    ..y = -0.1 * Math.PI 
    
renderer = new THREE.WebGLRenderer!
  ..set-pixel-ratio window.device-pixel-ratio
  ..set-size window.inner-width, window.inner-height
  document.body.append-child ..dom-element

window.add-event-listener \resize !->
  camera.aspect = window.inner-width / window.inner-height
  camera.update-projection-matrix!
  renderer.set-size window.inner-width, window.inner-height
  dims-uniform.value = new THREE.Vector2 window.inner-width, window.inner-height

tick = 0
animate = !->
  requestAnimationFrame animate
  shield.position.z = 50 + 100 * Math.sin tick += 0.05
  time-uniform.value += 0.01
  renderer.render solids, camera, depth-map
  renderer.render scene, camera

animate!
!
999px

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