#8259 (#8279)

* #8259

* Update Loader.js

* Update Loader.js

src/loaders/Loader.js

@@ -155,6 +155,7 @@ THREE.Loader.prototype = {
 					case 'shading':
 						if ( value.toLowerCase() === 'basic' ) json.type = 'MeshBasicMaterial';
 						if ( value.toLowerCase() === 'phong' ) json.type = 'MeshPhongMaterial';
+						if ( value.toLowerCase() === 'standard' ) json.type = 'MeshStandardMaterial';
 						break;
 					case 'mapDiffuse':
 						json.map = loadTexture( value, m.mapDiffuseRepeat, m.mapDiffuseOffset, m.mapDiffuseWrap, m.mapDiffuseAnisotropy );
@@ -218,6 +219,22 @@ THREE.Loader.prototype = {
 					case 'mapSpecularWrap':
 					case 'mapSpecularAnisotropy':
 						break;
+					case 'mapMetalness':
+						json.metalnessMap = loadTexture( value, m.mapMetalnessRepeat, m.mapMetalnessOffset, m.mapMetalnessWrap, m.mapMetalnessAnisotropy );
+						break;
+					case 'mapMetalnessRepeat':
+					case 'mapMetalnessOffset':
+					case 'mapMetalnessWrap':
+					case 'mapMetalnessAnisotropy':
+						break;
+					case 'mapRoughness':
+						json.roughnessMap = loadTexture( value, m.mapRoughnessRepeat, m.mapRoughnessOffset, m.mapRoughnessWrap, m.mapRoughnessAnisotropy );
+						break;
+					case 'mapRoughnessRepeat':
+					case 'mapRoughnessOffset':
+					case 'mapRoughnessWrap':
+					case 'mapRoughnessAnisotropy':
+						break;
 					case 'mapAlpha':
 						json.alphaMap = loadTexture( value, m.mapAlphaRepeat, m.mapAlphaOffset, m.mapAlphaWrap, m.mapAlphaAnisotropy );
 						break;