Forgot to add CompressedTexture.js file to the repo.

src/textures/CompressedTexture.js

@@ -0,0 +1,25 @@
+/**
+ * @author alteredq / http://alteredqualia.com/
+ */
+
+THREE.CompressedTexture = function ( mipmaps, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter ) {
+
+	THREE.Texture.call( this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type );
+
+	this.image = { width: width, height: height };
+	this.mipmaps = mipmaps;
+
+};
+
+THREE.CompressedTexture.prototype = Object.create( THREE.Texture.prototype );
+
+THREE.CompressedTexture.prototype.clone = function () {
+
+	var clonedTexture = new THREE.CompressedTexture( this.mipmaps, this.image.width, this.image.height, this.format, this.type, this.mapping, this.wrapS, this.wrapT, this.magFilter, this.minFilter );
+
+	clonedTexture.offset.copy( this.offset );
+	clonedTexture.repeat.copy( this.repeat );
+
+	return clonedTexture;
+
+};