// End Portal fix by fayer3#2332 (Modified)
vec3[8] colors = vec3[](
    vec3(0.3472479, 0.6559956, 0.7387838) * 1.5,
    vec3(0.6010780, 0.7153565, 1.060625 ),
    vec3(0.4221090, 0.8135094, 0.9026056),
    vec3(0.3492291, 1.0241201, 1.8612821),
    vec3(0.7543085, 0.8238697, 0.6803233),
    vec3(0.4144472, 0.5648165, 0.8037   ),
    vec3(0.508905 , 0.6719649, 0.9982805),
    vec3(0.5361914, 0.4476583, 0.8008522));
color.rgb = vec3(0.4214321, 0.4722309, 1.9922364) * 0.08;

float dither = Bayer64(gl_FragCoord.xy);
#ifdef TAA
    dither = fract(dither + 1.61803398875 * mod(float(frameCounter), 3600.0));
    int repeat = 4;
#else
    int repeat = 8;
#endif
float dismult = 0.5;
for (int j = 0; j < repeat; j++) {
    float add = float(j + dither) * 0.0625 / float(repeat);
    for (int i = 1; i <= 8; i++) {
        float colormult = 0.9/(30.0+i);
        float rotation = (i - 0.1 * i + 0.71 * i - 11 * i + 21) * 0.01 + i * 0.01;
        float Cos = cos(radians(rotation));
        float Sin = sin(radians(rotation));
        vec2 offset = vec2(0.0, 1.0/(3600.0/24.0)) * pow(16.0 - i, 2.0) * 0.004;

        vec3 wpos = normalize((gbufferModelViewInverse * vec4(viewPos * (i * dismult + 1), 1.0)).xyz);
        if (abs(NdotU) > 0.9) {
            wpos.xz /= wpos.y;
            wpos.xz *= 0.06 * sign(- playerPos.y);
            wpos.xz *= abs(playerPos.y) + i * dismult + add;
            wpos.xz -= cameraPosition.xz * 0.05;
        } else {
            vec3 absPos = abs(playerPos);
            if (abs(dot(normal, eastVec)) > 0.9) {
                wpos.xz = wpos.yz / wpos.x;
                wpos.xz *= 0.06 * sign(- playerPos.x);
                wpos.xz *= abs(playerPos.x) + i * dismult + add;
                wpos.xz -= cameraPosition.yz * 0.05;
            } else {
                wpos.xz = wpos.yx / wpos.z;
                wpos.xz *= 0.06 * sign(- playerPos.z);
                wpos.xz *= abs(playerPos.z) + i * dismult + add;
                wpos.xz -= cameraPosition.yx * 0.05;
            }
        }
        vec2 pos = wpos.xz;

        vec2 wind = fract((frameTimeCounter + 984.0) * (i + 8) * 0.125 * offset);
        vec2 coord = mat2(Cos, Sin, -Sin, Cos) * pos + wind;
        if (mod(float(i), 4) < 1.5) coord = coord.yx + vec2(-1.0, 1.0) * wind.y;

        vec3 psample = pow(texture2D(tex, coord).rgb, vec3(0.85)) * colors[i-1] * colormult;
        color.rgb += psample * length(psample.rgb) * (3000.0 / repeat);
    }
}
color.rgb *= vec3(0.09, 0.077, 0.07);
emission = 10.0;
noDirectionalShading = true;

#ifdef COATED_TEXTURES
    noiseFactor = 0.0;
#endif

#ifdef PORTAL_EDGE_EFFECT
    //vec3 voxelPos = SceneToVoxel(mix(playerPos, vec3(0.0), -0.02)); // Fixes weird parallax offset
    vec3 voxelPos = SceneToVoxel(playerPos);

    float portalOffset = 0.08333 * dither;
    vec3[4] portalOffsets = vec3[](
        vec3( portalOffset, 0, portalOffset),
        vec3( portalOffset, 0,-portalOffset),
        vec3(-portalOffset, 0, portalOffset),
        vec3(-portalOffset, 0,-portalOffset)
    );

    float edge = 0.0;
    for (int i = 0; i < 4; i++) {
        int voxel = int(texelFetch(voxel_sampler, ivec3(voxelPos + portalOffsets[i]), 0).r);
        if (voxel == 58 || voxel == 255) { // End Portal Frame or Bedrock
            edge = 1.0; break;
        }
    }
    
    #ifdef END
        // No edge effect in the middle of the return fountain
        vec2 var1 = abs(playerPos.xz + cameraPosition.xz - 0.5);
        float var2 = max(var1.x, var1.y);
        if (var2 > 1.0)
    #endif

    {
        vec4 edgeColor = vec4(vec3(0.3, 0.6, 0.7), 1.0);
        color = mix(color, edgeColor, edge);
        emission = mix(emission, 5.0, edge);
    }
#endif