--- turing-fluid.html	2015-02-08 20:10:06.637157800 -0800
+++ turing-fluid.html	2015-02-08 20:10:59.514756010 -0800
@@ -205,8 +205,8 @@
   d = pixelSize*4.;
 
   vec2 gz; // blue blur2 gradient vector
-  gz.x += texture2D(sampler_blur2, uv-vec2(1.,0.)*d).z - texture2D(sampler_blur2, uv+vec2(1.,0.)*d).z;
-  gz.y += texture2D(sampler_blur2, uv-vec2(0.,1.)*d).z - texture2D(sampler_blur2, uv+vec2(0.,1.)*d).z;
+  gz.x = texture2D(sampler_blur2, uv-vec2(1.,0.)*d).z - texture2D(sampler_blur2, uv+vec2(1.,0.)*d).z;
+  gz.y = texture2D(sampler_blur2, uv-vec2(0.,1.)*d).z - texture2D(sampler_blur2, uv+vec2(0.,1.)*d).z;
 
   gl_FragColor = vec4(0.);
 
@@ -987,4 +987,4 @@
 	<canvas height="1059" width="1390" id="c"></canvas>
 
 
-</body></html>
\ No newline at end of file
+</body></html>