text: define(["three"], function(THREE){
  /**
   * @author alteredq / http://alteredqualia.com/
   *
   * Full-screen textured quad shader
   */
  
  THREE.CopyShader = {
  
  	uniforms: {
  
  		"tDiffuse": { value: null },
  		"opacity": { value: 1.0 }
  
  	},
  
  	vertexShader: [
  
  		"varying vec2 vUv;",
  
  		"void main() {",
  
  		"	vUv = uv;",
  		"	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
  
  		"}"
  
  	].join( "\n" ),
  
  	fragmentShader: [
  
  		"uniform float opacity;",
  
  		"uniform sampler2D tDiffuse;",
  
  		"varying vec2 vUv;",
  
  		"void main() {",
  
  		"	vec4 texel = texture2D( tDiffuse, vUv );",
  		"	gl_FragColor = opacity * texel;",
  
  		"}"
  
  	].join( "\n" )
  
  };
  
   return THREE.CopyShader;
  });