Changes

Define Curvature. Something like that Comment it out. That means adding "//" in front of it. It should look like this when you're done:

//#Define Curvature

For the original, to disable interlacing, change this line:

ilfac = vec2(1.0,floor(rubyInputSize.y/200.0));

to the following:

ilfac = vec2(1.0,1.0);

===Phosphor===