Fractals

       void surf (Input IN, inout SurfaceOutputStandard o)

       {

           float2 c = (IN.uv_MainTex / _Zoom) + _Offset.xy;

           float2 z = 0;

           int iter;

           float4 color;

           for (iter = 0; iter < _MaxIterations; iter++) {

               z = float2(z.x * z.x - z.y * z.y, 2 * z.x * z.y) + c;

               if (length(z) > 2) break;

           }

           if (iter == _MaxIterations) {

               color = float4(0,0,0,1);

           } else {

               color = float4(sin(iter / _Red), sin(iter / _Green), sin(iter / _Blue), 1) / 4 + 0.75;

           }

           o.Albedo = color;

       }