WebGLRenderer: Better code structure in .projectObject()

src/renderers/WebGLRenderer.js

@@ -1434,11 +1434,7 @@ function WebGLRenderer( parameters ) {
 							var groups = geometry.groups;
 							var materials = material.materials;
 
-							if ( groups.length === 0 ) {
-
-								console.warn( 'THREE.WebGLRenderer: MultiMaterial can not be used without groups.' );
-
-							}
+							if ( groups.length > 0 ) {
 
 								// push a render item for each group of the geometry
 
@@ -1463,6 +1459,12 @@ function WebGLRenderer( parameters ) {
 
 								}
 
+							} else {
+
+								console.warn( 'THREE.WebGLRenderer: MultiMaterial can not be used without groups.' );
+
+							}
+
 						} else {
 
 							pushRenderItem( object, geometry, material, _vector3.z, null );