diff --git a/src/core/math/Matrix.js b/src/core/math/Matrix.js
index e66777b..3325b81 100644
--- a/src/core/math/Matrix.js
+++ b/src/core/math/Matrix.js
@@ -245,11 +245,11 @@
  * @param {Matrix} matrix
  * @return {Matrix} This matrix. Good for chaining method calls.
  */
-Matrix.prototype.prepend = function(matrix) 
+Matrix.prototype.prepend = function(matrix)
 {
     var tx1 = this.tx;
 
-    if (matrix.a != 1 || matrix.b != 0 || matrix.c != 0 || matrix.d != 1) 
+    if (matrix.a !== 1 || matrix.b !== 0 || matrix.c !== 0 || matrix.d !== 1)
     {
         var a1 = this.a;
         var c1 = this.c;
@@ -258,7 +258,7 @@
         this.c  = c1*matrix.a+this.d*matrix.c;
         this.d  = c1*matrix.b+this.d*matrix.d;
     }
-    
+
     this.tx = tx1*matrix.a+this.ty*matrix.c+matrix.tx;
     this.ty = tx1*matrix.b+this.ty*matrix.d+matrix.ty;
 
@@ -266,7 +266,7 @@
 };
 
 
-Matrix.prototype.invert = function() 
+Matrix.prototype.invert = function()
 {
     var a1 = this.a;
     var b1 = this.b;

diff --git a/src/core/math/Matrix.js b/src/core/math/Matrix.js
index e66777b..3325b81 100644
--- a/src/core/math/Matrix.js
+++ b/src/core/math/Matrix.js
@@ -245,11 +245,11 @@
  * @param {Matrix} matrix
  * @return {Matrix} This matrix. Good for chaining method calls.
  */
-Matrix.prototype.prepend = function(matrix) 
+Matrix.prototype.prepend = function(matrix)
 {
     var tx1 = this.tx;
 
-    if (matrix.a != 1 || matrix.b != 0 || matrix.c != 0 || matrix.d != 1) 
+    if (matrix.a !== 1 || matrix.b !== 0 || matrix.c !== 0 || matrix.d !== 1)
     {
         var a1 = this.a;
         var c1 = this.c;
@@ -258,7 +258,7 @@
         this.c  = c1*matrix.a+this.d*matrix.c;
         this.d  = c1*matrix.b+this.d*matrix.d;
     }
-    
+
     this.tx = tx1*matrix.a+this.ty*matrix.c+matrix.tx;
     this.ty = tx1*matrix.b+this.ty*matrix.d+matrix.ty;
 
@@ -266,7 +266,7 @@
 };
 
 
-Matrix.prototype.invert = function() 
+Matrix.prototype.invert = function()
 {
     var a1 = this.a;
     var b1 = this.b;
diff --git a/src/core/renderers/webgl/managers/FilterManager.js b/src/core/renderers/webgl/managers/FilterManager.js
index 0e495df..8dd416e 100644
--- a/src/core/renderers/webgl/managers/FilterManager.js
+++ b/src/core/renderers/webgl/managers/FilterManager.js
@@ -1,5 +1,4 @@
 var WebGLManager = require('./WebGLManager'),
-    FilterTexture = require('../utils/FilterTexture'),
     RenderTarget = require('../utils/RenderTarget'),
     TextureShader = require('../shaders/TextureShader'),
     Quad = require('../utils/Quad'),
@@ -53,7 +52,7 @@
  * @param renderer {WebGLRenderer}
  * @param buffer {ArrayBuffer}
  */
-FilterManager.prototype.begin = function (buffer)
+FilterManager.prototype.begin = function ()
 {
     //TODO sort out bounds - no point creating a new rect each frame!
     //this.defaultShader = this.renderer.shaderManager.plugins.defaultShader;
@@ -68,7 +67,6 @@
  */
 FilterManager.prototype.pushFilter = function (target, filters)
 {
-    var gl = this.renderer.gl;
     //console.log("push")
     // get the bounds of the object..
     var bounds = target.filterArea || target.getBounds();
@@ -306,8 +304,6 @@
 {
     WebGLManager.prototype.destroy.call(this);
 
-    var gl = this.renderer.gl;
-
     this.filterStack = null;
     this.offsetY = 0;
 

diff --git a/src/core/math/Matrix.js b/src/core/math/Matrix.js
index e66777b..3325b81 100644
--- a/src/core/math/Matrix.js
+++ b/src/core/math/Matrix.js
@@ -245,11 +245,11 @@
  * @param {Matrix} matrix
  * @return {Matrix} This matrix. Good for chaining method calls.
  */
-Matrix.prototype.prepend = function(matrix) 
+Matrix.prototype.prepend = function(matrix)
 {
     var tx1 = this.tx;
 
-    if (matrix.a != 1 || matrix.b != 0 || matrix.c != 0 || matrix.d != 1) 
+    if (matrix.a !== 1 || matrix.b !== 0 || matrix.c !== 0 || matrix.d !== 1)
     {
         var a1 = this.a;
         var c1 = this.c;
@@ -258,7 +258,7 @@
         this.c  = c1*matrix.a+this.d*matrix.c;
         this.d  = c1*matrix.b+this.d*matrix.d;
     }
-    
+
     this.tx = tx1*matrix.a+this.ty*matrix.c+matrix.tx;
     this.ty = tx1*matrix.b+this.ty*matrix.d+matrix.ty;
 
@@ -266,7 +266,7 @@
 };
 
 
-Matrix.prototype.invert = function() 
+Matrix.prototype.invert = function()
 {
     var a1 = this.a;
     var b1 = this.b;
diff --git a/src/core/renderers/webgl/managers/FilterManager.js b/src/core/renderers/webgl/managers/FilterManager.js
index 0e495df..8dd416e 100644
--- a/src/core/renderers/webgl/managers/FilterManager.js
+++ b/src/core/renderers/webgl/managers/FilterManager.js
@@ -1,5 +1,4 @@
 var WebGLManager = require('./WebGLManager'),
-    FilterTexture = require('../utils/FilterTexture'),
     RenderTarget = require('../utils/RenderTarget'),
     TextureShader = require('../shaders/TextureShader'),
     Quad = require('../utils/Quad'),
@@ -53,7 +52,7 @@
  * @param renderer {WebGLRenderer}
  * @param buffer {ArrayBuffer}
  */
-FilterManager.prototype.begin = function (buffer)
+FilterManager.prototype.begin = function ()
 {
     //TODO sort out bounds - no point creating a new rect each frame!
     //this.defaultShader = this.renderer.shaderManager.plugins.defaultShader;
@@ -68,7 +67,6 @@
  */
 FilterManager.prototype.pushFilter = function (target, filters)
 {
-    var gl = this.renderer.gl;
     //console.log("push")
     // get the bounds of the object..
     var bounds = target.filterArea || target.getBounds();
@@ -306,8 +304,6 @@
 {
     WebGLManager.prototype.destroy.call(this);
 
-    var gl = this.renderer.gl;
-
     this.filterStack = null;
     this.offsetY = 0;
 
diff --git a/src/core/renderers/webgl/utils/Quad.js b/src/core/renderers/webgl/utils/Quad.js
index e3b4e5c..249d17b 100644
--- a/src/core/renderers/webgl/utils/Quad.js
+++ b/src/core/renderers/webgl/utils/Quad.js
@@ -1,10 +1,7 @@
-var WebGLManager = require('./WebGLManager'),
-    utils = require('../../../utils');
-
 /**
  * @class
  * @namespace PIXI
- * @param renderer {WebGLRenderer} The renderer this manager works for.
+ * @param gl {WebGLRenderingContext} The gl context for this quad to use.
  */
 function Quad(gl)
 {
@@ -33,7 +30,7 @@
         white,
         white,
         white
-    ])
+    ]);
 
     this.indices = new Uint16Array([
         0, 1, 2, 0, 3, 2
@@ -55,8 +52,8 @@
 
 Quad.prototype.map = function(rect, rect2)
 {
-    var x = 0//rect2.x / rect.width;
-    var y = 0//rect2.y / rect.height;
+    var x = 0; //rect2.x / rect.width;
+    var y = 0; //rect2.y / rect.height;
 
     this.uvs[0] = x;
     this.uvs[1] = y;
@@ -87,7 +84,7 @@
     this.vertices[7] = y + rect2.height;
 
     this.upload();
-}
+};
 
 Quad.prototype.upload = function()
 {
@@ -100,7 +97,7 @@
     gl.bufferSubData(gl.ARRAY_BUFFER, 8 * 4, this.uvs);
 
     gl.bufferSubData(gl.ARRAY_BUFFER, (8 + 8) * 4, this.colors);
-}
+};
 
 module.exports = Quad;