source: experimental/distortionNG/shader.frag @ 334

uniform sampler2D sceneTexture;
uniform sampler2D intensityMapTexture;
varying vec2 texcoord_scene;
varying vec2 texcoord_intensityMap;

void main(void)
{
        vec4 sceneColor;
        vec4 blendColor;

        sceneColor = texture2D(sceneTexture, texcoord_scene);
        blendColor = texture2D(intensityMapTexture, gl_FragCoord);
        //gl_FragColor = vec4( 1.,1.,1.,1.);
        gl_FragColor = sceneColor;
}