uniform sampler2D SCREEN_TEXTURE;

highp float random(highp float seed){
    return fract(543.2543 * sin(seed * 3525.46));
}

void fragment() {
    highp vec2 uv = UV;

    highp float particles = random(TIME * 0.5 + uv.x * uv.y);

    highp vec3 atmosphereColor = vec3(uv.x, uv.y, 0.5);

    highp vec3 finalColor = atmosphereColor * 0.6;

    finalColor += texture(SCREEN_TEXTURE, uv - vec2(0.01, 0.01)).rgb * 0.2;

    finalColor *= vec3(particles);

    finalColor *= vec3(1.0, 1.0, 1.0);

    COLOR = vec4(finalColor, 0.01);
}