window.preparePBRMetallicRoughness = function() {
	var pbr = new BABYLON.PBRMetallicRoughnessMaterial("pbrmetallicroughness", scene);

	pbr.baseTexture = new BABYLON.Texture("/Playground/textures/amiga.jpg", scene);
	pbr.baseTexture.uScale = 5;
	pbr.baseTexture.vScale = 5;
	pbr.metallic = 0.5;
	pbr.roughness = 0.1;

    // Uncomment for PMREM Generation
    var hdrTexture = new BABYLON.HDRCubeTexture("/Playground/textures/environment.hdr", scene, 512);
    // var hdrTexture = new BABYLON.HDRCubeTexture("textures/hdr/environment.hdr", scene, 128, false, true, false, true);

    // Skybox
    var hdrSkybox = scene.createDefaultSkybox(hdrTexture, true);
    hdrSkybox.setEnabled(false);

    registerRangeUI("pbrmetallicroughness", "alpha", 0, 1, function(value) {
		pbr.alpha = value;
	}, function() {
		return pbr.alpha;
	});

	registerRangeUI("pbrmetallicroughness", "metallic", 0, 1, function(value) {
		pbr.metallic = value;
	}, function() {
		return pbr.metallic;
	});
	
	registerRangeUI("pbrmetallicroughness", "roughness", 0, 1, function(value) {
		pbr.roughness = value;
	}, function() {
		return pbr.roughness;
	});

	registerRangeUI("pbrmetallicroughness", "baseColorR", 0, 1, function(value) {
		pbr.baseColor.r = value;
	}, function() {
		return pbr.baseColor.r;
	});

	registerRangeUI("pbrmetallicroughness", "baseColorG", 0, 1, function(value) {
		pbr.baseColor.g = value;
	}, function() {
		return pbr.baseColor.g;
	});

	registerRangeUI("pbrmetallicroughness", "baseColorB", 0, 1, function(value) {
		pbr.baseColor.b = value;
	}, function() {
		return pbr.baseColor.b;
	});

	registerRangeUI("pbrmetallicroughness", "emissiveColorR", 0, 1, function(value) {
		pbr.emissiveColor.r = value;
	}, function() {
		return pbr.emissiveColor.r;
	});

	registerRangeUI("pbrmetallicroughness", "emissiveColorG", 0, 1, function(value) {
		pbr.emissiveColor.g = value;
	}, function() {
		return pbr.emissiveColor.g;
	});

	registerRangeUI("pbrmetallicroughness", "emissiveColorB", 0, 1, function(value) {
		pbr.emissiveColor.b = value;
	}, function() {
		return pbr.emissiveColor.b;
	});

	registerRangeUI("pbrmetallicroughness", "baseTextureLevel", 0, 1, function(value) {
		pbr.baseTexture.level = value;
	}, function() {
		return pbr.baseTexture.level;
	});
    
    registerButtonUI("pbrmetallicroughness", "Toggle Skybox", function() {
        hdrSkybox.setEnabled(!hdrSkybox.isEnabled());
	});

	return pbr;
}