code: function SpriteMaterial( parameters ) {
  
  	Material.call( this );
  
  	this.type = 'SpriteMaterial';
  
  	this.color = new Color( 0xffffff );
  	this.map = null;
  
  	this.rotation = 0;
  
  	this.sizeAttenuation = true;
  
  	this.lights = false;
  	this.transparent = true;
  
  	this.setValues( parameters );
  
  }
docs: @author alteredq / http://alteredqualia.com/
  
  parameters = {
  color: <hex>,
  map: new THREE.Texture( <Image> ),
  rotation: <float>,
  sizeAttenuation: <bool>
  }