Updated builds.

build/three.js

@@ -12546,6 +12546,8 @@
 
 			} else {
 
+				this.computeFaceNormals();
+
 				for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {
 
 					face = this.faces[ f ];
@@ -12594,6 +12596,42 @@
 
 		},
 
+		computeFlatVertexNormals: function () {
+
+			var f, fl, face;
+
+			this.computeFaceNormals();
+
+			for ( f = 0, fl = this.faces.length; f < fl; f ++ ) {
+
+				face = this.faces[ f ];
+
+				var vertexNormals = face.vertexNormals;
+
+				if ( vertexNormals.length === 3 ) {
+
+					vertexNormals[ 0 ].copy( face.normal );
+					vertexNormals[ 1 ].copy( face.normal );
+					vertexNormals[ 2 ].copy( face.normal );
+
+				} else {
+
+					vertexNormals[ 0 ] = face.normal.clone();
+					vertexNormals[ 1 ] = face.normal.clone();
+					vertexNormals[ 2 ] = face.normal.clone();
+
+				}
+
+			}
+
+			if ( this.faces.length > 0 ) {
+
+				this.normalsNeedUpdate = true;
+
+			}
+
+		},
+
 		computeMorphNormals: function () {
 
 			var i, il, f, fl, face;