diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index f46d1c0..07f381e 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -125,7 +125,7 @@
     gl.uniformMatrix3fv(shader.translationMatrix, false, this.worldTransform.toArray(true));
     gl.uniform2f(shader.projectionVector, projection.x, -projection.y);
     gl.uniform2f(shader.offsetVector, -offset.x, -offset.y);
-    gl.uniform1f(shader.alpha, 1);
+    gl.uniform1f(shader.alpha, this.worldAlpha);
 
     if(!this.dirty)
     {
@@ -143,7 +143,7 @@
         // check if a texture is dirty..
         if(this.texture.baseTexture._dirty[gl.id])
         {
-            this.renderSession.renderer.updateTexture(this.texture.baseTexture);
+            renderSession.renderer.updateTexture(this.texture.baseTexture);
         }
         else
         {

diff --git a/src/pixi/extras/Strip.js b/src/pixi/extras/Strip.js
index f46d1c0..07f381e 100644
--- a/src/pixi/extras/Strip.js
+++ b/src/pixi/extras/Strip.js
@@ -125,7 +125,7 @@
     gl.uniformMatrix3fv(shader.translationMatrix, false, this.worldTransform.toArray(true));
     gl.uniform2f(shader.projectionVector, projection.x, -projection.y);
     gl.uniform2f(shader.offsetVector, -offset.x, -offset.y);
-    gl.uniform1f(shader.alpha, 1);
+    gl.uniform1f(shader.alpha, this.worldAlpha);
 
     if(!this.dirty)
     {
@@ -143,7 +143,7 @@
         // check if a texture is dirty..
         if(this.texture.baseTexture._dirty[gl.id])
         {
-            this.renderSession.renderer.updateTexture(this.texture.baseTexture);
+            renderSession.renderer.updateTexture(this.texture.baseTexture);
         }
         else
         {
diff --git a/src/pixi/renderers/webgl/utils/WebGLShaderManager.js b/src/pixi/renderers/webgl/utils/WebGLShaderManager.js
index d342e03..b597698 100644
--- a/src/pixi/renderers/webgl/utils/WebGLShaderManager.js
+++ b/src/pixi/renderers/webgl/utils/WebGLShaderManager.js
@@ -19,6 +19,8 @@
         this.attribState[i] = false;
     }
 
+    this.stack = [];
+    
     //this.setContext(gl);
     // the final one is used for the rendering strips
 };