diff --git a/build/three.js b/build/three.js
index f28541fe2aac91e5563069498510b1da6d67b972..0dff8fd8414eef0443e4f954e30e00b5ae84cb26 100644
--- a/build/three.js
+++ b/build/three.js
@@ -31736,7 +31736,7 @@ THREE.LatheGeometry = function ( points, segments, phiStart, phiLength ) {
 	phiStart = phiStart || 0;
 	phiLength = phiLength || 2 * Math.PI;
 
-	var inversePointLength = 1.0 / points.length;
+	var inversePointLength = 1.0 / ( points.length - 1 );
 	var inverseSegments = 1.0 / segments;
 
 	for ( var i = 0, il = segments; i <= il; i ++ ) {
@@ -31776,9 +31776,9 @@ THREE.LatheGeometry = function ( points, segments, phiStart, phiLength ) {
 
 			this.faces.push( new THREE.Face4( a, b, c, d ) );
 
-			var u0 = 1 - i * inverseSegments;
+			var u0 = i * inverseSegments;
 			var v0 = j * inversePointLength;
-			var u1 = u0 - inverseSegments;
+			var u1 = u0 + inverseSegments;
 			var v1 = v0 + inversePointLength;
 
 			this.faceVertexUvs[ 0 ].push( [
@@ -31794,6 +31794,7 @@ THREE.LatheGeometry = function ( points, segments, phiStart, phiLength ) {
 
 	}
 
+	this.mergeVertices();
 	this.computeCentroids();
 	this.computeFaceNormals();
 	this.computeVertexNormals();
diff --git a/src/extras/geometries/LatheGeometry.js b/src/extras/geometries/LatheGeometry.js
index 86f2e7de0e866eeee91ffa8f329ec2d8b728ebaf..6bfd883e3dc2d4fe2e8fd140673550addc2e5362 100644
--- a/src/extras/geometries/LatheGeometry.js
+++ b/src/extras/geometries/LatheGeometry.js
@@ -18,7 +18,7 @@ THREE.LatheGeometry = function ( points, segments, phiStart, phiLength ) {
 	phiStart = phiStart || 0;
 	phiLength = phiLength || 2 * Math.PI;
 
-	var inversePointLength = 1.0 / points.length;
+	var inversePointLength = 1.0 / ( points.length - 1 );
 	var inverseSegments = 1.0 / segments;
 
 	for ( var i = 0, il = segments; i <= il; i ++ ) {
@@ -58,9 +58,9 @@ THREE.LatheGeometry = function ( points, segments, phiStart, phiLength ) {
 
 			this.faces.push( new THREE.Face4( a, b, c, d ) );
 
-			var u0 = 1 - i * inverseSegments;
+			var u0 = i * inverseSegments;
 			var v0 = j * inversePointLength;
-			var u1 = u0 - inverseSegments;
+			var u1 = u0 + inverseSegments;
 			var v1 = v0 + inversePointLength;
 
 			this.faceVertexUvs[ 0 ].push( [
@@ -76,6 +76,7 @@ THREE.LatheGeometry = function ( points, segments, phiStart, phiLength ) {
 
 	}
 
+	this.mergeVertices();
 	this.computeCentroids();
 	this.computeFaceNormals();
 	this.computeVertexNormals();