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 );

}
@author alteredq / http://alteredqualia.com/

parameters = {
 color: <hex>,
 map: new THREE.Texture( <Image> ),
 rotation: <float>,
 sizeAttenuation: <bool>
}