2
Here's a starting point, using a float variable _Density to control how many repeats you get.
float3 n = normalize(IN.worldNormal);
// Get longitude (x) in the range -1...1, and latitude (y) in the range (-0.5...0.5).
float2 longLat = float2(atan2(n.z, n.x), asin(n.y)) / 3.141592653589f;
// Count how many rows we can fit top ...
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