diff --git a/Examples/Tests/layer.frag b/Examples/Tests/layer.frag
index ba35edf..279e6d1 100644
--- a/Examples/Tests/layer.frag
+++ b/Examples/Tests/layer.frag
@@ -7,5 +7,5 @@ uniform sampler2D t2;
 void main () {
   vec4 c1 = texture2D(t1, uv);
   vec4 c2 = texture2D(t2, uv);
-  gl_FragColor = vec4(mix(c1.rgb, c2.rgb, c2.a), 1.0);
+  gl_FragColor = vec4(mix(c1.rgb, c2.rgb, c2.a), c1.a + c2.a);
 }