Merge pull request #11279 from abhishekbansal1993/dev

In MtlLoader.js changed case 'Td' to 'td', since the param has been changed to lowercase in switch statement

examples/js/loaders/MTLLoader.js

@@ -449,7 +449,7 @@ THREE.MTLLoader.MaterialCreator.prototype = {
 
 					break;
 
-				case 'Tr':
+				case 'tr':
 
 					if ( value > 0 ) {