// RGB split that ripples down the image and gets pushed around by your movement.
uniform float amount;  // 0.0 .. 0.05 = 0.012
uniform float waves;   // 1.0 .. 80.0 = 24.0
uniform float react;   // 0.0 .. 3.0 = 1.0

void main() {
    vec2 d = vec2(amount * sin(uv.y * waves + time * 3.0), 0.0);
    d += texture(flow, uv).xy * react;
    color = vec4(texture(camera, uv + d).r,
                 texture(camera, uv).g,
                 texture(camera, uv - d).b, 1.0);
}