material {
    name : Mirror,
    flipUV : true,
    culling: none,
    parameters : [
        {
            type : sampler2d,
            name : albedo
        }
    ],
    requires : [
        uv0
    ],
    shadingModel : unlit,
}

fragment {
    void material(inout MaterialInputs material) {
        prepareMaterial(material);
        if (gl_FrontFacing) {

            // Make a lookup into the mirror texture.
            vec2 uv = getResolution().zw * gl_FragCoord.xy;
            material.baseColor.rgb = texture(materialParams_albedo, uv).rgb;

            // Add black borders to the mirror.
            vec2 st = getUV0();
            float minDist0 = min(st.x, st.y);
            float minDist1 = min(1.0 - st.x, 1.0 - st.y);
            float minDist = min(minDist0, minDist1);
            material.baseColor.rgb *= smoothstep(0.0, 0.1, minDist);

        }
        material.baseColor.a = 1.0;
    }
}