FBXLoader: Clean up.

examples/js/loaders/FBXLoader.js

@@ -604,6 +604,7 @@ THREE.FBXLoader = ( function () {
 						break;
 
 					case 'TransparentColor':
+					case 'TransparencyFactor':
 						parameters.alphaMap = scope.getTexture( textureMap, child.ID );
 						parameters.transparent = true;
 						break;