private static void GenerateSampleKernel(IRandom random, Span <Float4> kernel)
{
//Generate points in the hemisphere with higher density near the center
for (int i = 0; i < kernel.Length; i++)
{
Float3 dir = Float3.FastNormalize(
random.GetBetween(minValue: (-1f, -1f, .2f), maxValue: (1f, 1f, 1f)));
float scale = (float)i / kernel.Length;
Float3 point = dir * FloatUtils.Lerp(.1f, 1f, scale * scale);
kernel[i] = point.XYZ0;
}
}