Thank you, sirs. At least it's nice to know what's going on now - I was
baffled - haven't even thought about bounding since version 2.

Regards,
Dave

"Mick Hazelgrove" <mha### [at] redhotantcom> wrote in message
news:3926a822$1@news.povray.org...
> I have this problem rendering thousands of blades of grass, I've never
found
> a solution that really works, though Peter's suggestion sometimes has a
> small effect.
>
> Mick
> "Peter Popov" <pet### [at] usanet> wrote in message
> news:i1lciskkd7l89lm1gfa3ocom0298vrtu35@4ax.com...
> > On Sat, 20 May 2000 00:46:43 -0700, "Dave Blandston"
> > <gra### [at] earthlinknet> wrote:
> >
> > >BTW, I should have mentioned that peak memory used is only about 12MB
> with
> > >the CSG Union version, and my computer has 128MB RAM. There's no disk
> > >thrashing going on, but maybe this is a CPU cache issue?
> >
> > No, not at all. It's related to bounding. Are you using manual
> > bounding? Is automatic counding on? Most importantly, is union
> > splitting on? How about removing user bounds (if any)? Are vista and
> > light buffers on?
> >
> > What is most probably happening is that for some reason (a bad
> > combination of settings) POV is checking each ray against all objects
> > in the scene. As a quick test, try these command line options:
> >
> > +mb0 +ul +uv +ur +su
> >
> > If this does not work, read the docs :) especially the chapter about
> > automatic bounding control and removing user bounds.
> >
> > HTH
> >
> >
> > Peter Popov ICQ : 15002700
> > Personal e-mail : pet### [at] usanet
> > TAG      e-mail : pet### [at] tagpovrayorg
>
>

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