diff --git a/src/particles/webgl/ParticleBuffer.js b/src/particles/webgl/ParticleBuffer.js
index 0d41f66..e118769 100644
--- a/src/particles/webgl/ParticleBuffer.js
+++ b/src/particles/webgl/ParticleBuffer.js
@@ -259,12 +259,16 @@
     destroy()
     {
         this.dynamicProperties = null;
-        this.dynamicData = null;
         this.dynamicBuffer.destroy();
+        this.dynamicBuffer = null;
+        this.dynamicData = null;
+        this.dynamicDataUint32 = null;
 
         this.staticProperties = null;
-        this.staticData = null;
         this.staticBuffer.destroy();
+        this.staticBuffer = null;
+        this.staticData = null;
+        this.staticDataUint32 = null;
     }
 
 }

diff --git a/src/particles/webgl/ParticleBuffer.js b/src/particles/webgl/ParticleBuffer.js
index 0d41f66..e118769 100644
--- a/src/particles/webgl/ParticleBuffer.js
+++ b/src/particles/webgl/ParticleBuffer.js
@@ -259,12 +259,16 @@
     destroy()
     {
         this.dynamicProperties = null;
-        this.dynamicData = null;
         this.dynamicBuffer.destroy();
+        this.dynamicBuffer = null;
+        this.dynamicData = null;
+        this.dynamicDataUint32 = null;
 
         this.staticProperties = null;
-        this.staticData = null;
         this.staticBuffer.destroy();
+        this.staticBuffer = null;
+        this.staticData = null;
+        this.staticDataUint32 = null;
     }
 
 }
diff --git a/src/particles/webgl/ParticleShader.js b/src/particles/webgl/ParticleShader.js
index b3584fe..d536190 100644
--- a/src/particles/webgl/ParticleShader.js
+++ b/src/particles/webgl/ParticleShader.js
@@ -31,10 +31,10 @@
                 'varying vec4 vColor;',
 
                 'void main(void){',
-                '   vec2 v = aVertexPosition;',
+                '   float x = (aVertexPosition.x) * cos(aRotation) - (aVertexPosition.y) * sin(aRotation);',
+                '   float y = (aVertexPosition.x) * sin(aRotation) + (aVertexPosition.y) * cos(aRotation);',
 
-                '   v.x = (aVertexPosition.x) * cos(aRotation) - (aVertexPosition.y) * sin(aRotation);',
-                '   v.y = (aVertexPosition.x) * sin(aRotation) + (aVertexPosition.y) * cos(aRotation);',
+                '   vec2 v = vec2(x, y);',
                 '   v = v + aPositionCoord;',
 
                 '   gl_Position = vec4((projectionMatrix * vec3(v, 1.0)).xy, 0.0, 1.0);',
@@ -52,7 +52,6 @@
 
                 'void main(void){',
                 '  vec4 color = texture2D(uSampler, vTextureCoord) * vColor;',
-                '  if (color.a == 0.0) discard;',
                 '  gl_FragColor = color;',
                 '}',
             ].join('\n')