function MeshPhysicalMaterial( parameters ) {

	MeshStandardMaterial.call( this );

	this.defines = { 'PHYSICAL': '' };

	this.type = 'MeshPhysicalMaterial';

	this.reflectivity = 0.5; // maps to F0 = 0.04

	this.clearCoat = 0.0;
	this.clearCoatRoughness = 0.0;

	this.setValues( parameters );

}
@author WestLangley / http://github.com/WestLangley

parameters = {
 reflectivity: <float>
 clearCoat: <float>
 clearCoatRoughness: <float>
}