uniform sampler2D inputImage;
uniform vec4 shadowColor;
uniform vec4 highlightColor;
uniform float gamma;
uniform float flickerAmount;
uniform float flickerRate;
uniform float randomness;
uniform int enableScratches;
uniform float scratchNumber;
uniform float scratchSpeed;
uniform float scratchBrightness;
uniform float scratchThickness;
uniform float scratchFlickerRate;
uniform float scratchWiggle;