Had a bit of an error in how I was handling my harmonic mean function that I
fixed.

Here is a run on a real mesh, and it looks like there may some potential.

For scale, the elephant mesh is approximately 240x220x110.  I have run a 500x500
sampling grid over a ~350x350 square.  Note:I am using a square that uses the
diagonal corner length of the mesh bounding box, so it tends to end up larger
than it needs to be, but this just easily ensures that I am sampling the whole
object without having to sample the whole image/scene.

The other settings I used were:
normal angle = 75deg;
normal samples = 24;
standardized depth for harmonic mean = 10

-tgq

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