Gilles Tran wrote:
> 
> This one puzzles me...
> The code below shows 2 bunches of cones. One is called "slow", the other
> one "quick". Render the code to see why : render the "quick" ones first
> and then the "slow" ones.
> The only difference between the slow and quick ones is that the slow
> ones have a slightly larger base radius.
> POV says that the slow cones are infinite objects !!!!
> I came upon this problem when rendering a tree : for some mysterious
> reason, some trees took forever to render (not counting parsing time).
> The "slow" cones below were (painstakingly) extracted from a file
> containing 16000 cones.
> 
> Scaling the cones or moving the camera sometimes make the problem
> disappear, sometimes not.
> 
> Any idea about what's going wrong ?
> 
> Gilles

It obviously has something to do with the small difference between the base and
the top of the slow cones. The difference here is more or less redundant. I
changed them into cylinders and it rendered fast and seamless.
I don't know what the actual cause is, it's somewhere in the code, but assuming
you don't want to make a patch for this I guess there's not much more you can do
then adapt your scene-code or sit and wait.

Regards,

Remco

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