Well, I oversimplified my description a bit.  I think it actually is
frame 1: fog +  0 objects
frame 2: fog + 100 cylinders
frame 3: fog + 200 cylinders
frame 4: fog + 300 cylinders.
.. reaching a maximum number of objects of 2400 at frame 25, I guess.

Perhaps I just need to put those 100 cylinders in the first frame!!  Thanks,
will try. . .


Ron Parker wrote:

> There was a discussion in c.g.r.r. about this a few months ago.  The
> consensus in that case was that if you start with an empty frame and
> build up to frames with many, many objects, POV gets confused when it
> determines its bounding parameters (By default, automatic bounding is
> disabled when you have fewer than 25 items in the frame.  It has been
> determined empirically that this means fewer than 25 items in the FIRST
> frame.)  One way to override this is to put +MB0 on the command line
> or in the render options dialog.
>
> However, you say you have 100 elements in the first frame, so this may
> not apply.  There may be other parameters that are set the same way,
> however.  One way to check is to add a thousand or so invisible objects
> (out of view of the camera, and well-bounded) to the first frame and see
> if it changes the nature of the problem.  If it does, compare the render
> statistics for the frame with and without the invisible objects and see
> if you can find out what's making the difference.

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