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Mike Raiford schrieb:
> Curious, but why is this? Are there any higher sample numbers that give
> a hexagonal shape?
No, these are the only ones (at least at present).
What POV-Ray actually does is use the largest of several hard-coded
patterns (plus jitter) that fits the target count, then add some
arbitrary points to get the target count.
The hard-coded patterns are a 4-sample pattern as well as a 7-sample,
19-sample and 37-sample pattern. Except for the 4-sample pattern, all of
these fit nicely on a triangular grid to form a hexagon, which is what
gives you a hexagonal bokeh if you exactly match these numbers.
The additional random points are then taken from a square grid, which is
what leads to the square bokeh typical for other sample counts.
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