"Thomas Lake" <tla### [at] homecom> wrote in message
news:3b072a0a@news.povray.org...
[snip]
> translation there still seems to be too few blades. A good portion
of the
> 60,000+ blades are out of view on the other side of the HF.
>

I recently had a heavy session with MP's trace and had similar
problems - low density and wasted objects. One solution was to fire
test rays from the camera at the scene and incrementing the counter
for a "hit". Haven't tried hf_height_at so don't know if trace will
work for you.

Alf

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