diff --git a/src/core/renderers/webgl/filters/SpriteMaskFilter.frag b/src/core/renderers/webgl/filters/SpriteMaskFilter.frag
deleted file mode 100644
index 223713a..0000000
--- a/src/core/renderers/webgl/filters/SpriteMaskFilter.frag
+++ /dev/null
@@ -1,21 +0,0 @@
-precision lowp float;
-
-varying vec2 vMaskCoord;
-varying vec2 vTextureCoord;
-varying vec4 vColor;
-
-uniform sampler2D uSampler;
-uniform sampler2D mask;
-
-void main(void)
-{
-
-// check clip! this will stop the mask bleeding out from the edges
-    vec2 text = abs( vMaskCoord - 0.5 );
-    text = step(0.5, text);
-    float clip = 1.0 - max(text.y, text.x);
-    vec4 original = texture2D(uSampler, vTextureCoord);
-    vec4 masky = texture2D(mask, vMaskCoord);
-    original *= (masky.r * masky.a * clip);
-    gl_FragColor = original;
-}

diff --git a/src/core/renderers/webgl/filters/SpriteMaskFilter.frag b/src/core/renderers/webgl/filters/SpriteMaskFilter.frag
deleted file mode 100644
index 223713a..0000000
--- a/src/core/renderers/webgl/filters/SpriteMaskFilter.frag
+++ /dev/null
@@ -1,21 +0,0 @@
-precision lowp float;
-
-varying vec2 vMaskCoord;
-varying vec2 vTextureCoord;
-varying vec4 vColor;
-
-uniform sampler2D uSampler;
-uniform sampler2D mask;
-
-void main(void)
-{
-
-// check clip! this will stop the mask bleeding out from the edges
-    vec2 text = abs( vMaskCoord - 0.5 );
-    text = step(0.5, text);
-    float clip = 1.0 - max(text.y, text.x);
-    vec4 original = texture2D(uSampler, vTextureCoord);
-    vec4 masky = texture2D(mask, vMaskCoord);
-    original *= (masky.r * masky.a * clip);
-    gl_FragColor = original;
-}
diff --git a/src/core/renderers/webgl/filters/SpriteMaskFilter.vert b/src/core/renderers/webgl/filters/SpriteMaskFilter.vert
deleted file mode 100644
index 5299c1f..0000000
--- a/src/core/renderers/webgl/filters/SpriteMaskFilter.vert
+++ /dev/null
@@ -1,18 +0,0 @@
-attribute vec2 aVertexPosition;
-attribute vec2 aTextureCoord;
-attribute vec4 aColor;
-
-uniform mat3 projectionMatrix;
-uniform mat3 otherMatrix;
-
-varying vec2 vMaskCoord;
-varying vec2 vTextureCoord;
-varying vec4 vColor;
-
-void main(void)
-{
-    gl_Position = vec4((projectionMatrix * vec3(aVertexPosition, 1.0)).xy, 0.0, 1.0);
-    vTextureCoord = aTextureCoord;
-    vMaskCoord = ( otherMatrix * vec3( aTextureCoord, 1.0)  ).xy;
-    vColor = vec4(aColor.rgb * aColor.a, aColor.a);
-}