Xplo Eristotle wrote:
> 
> I've been working on a scene that's about ready for final render, but
> one of the things in the scene is a CSG of about 8000 small objects, and
> the autobounding is a LITTLE more liberal than it needs to be.. say, two
> to three times the actual size of the CSG. If I'm not mistaken, this
> means that for every ray that hits that box, it'll have to test against
> all of those 8000 objects, even though most of the rays will never hit
> any of them. In any case, the middle third of my render just crawls..
> anyone have any suggestions for speeding this up? Would manual bounding
> help? Is there some clever trick I can use?
> 
> -Xplo

If you are using any truncated cone (like cone{<0,0,0>1,<0,1,0>,0.5} )
be aware that there is a bug on the bounding box size (too big)
(for the previous cone, the box has a height of 2, not 1, and if
instead of 0.5 it is 0.95, the height is about 20 !!)

This bug is present in the official 3.1g
(and has been reported in p.b, so no more action needed until 3.5 !)

Post a reply to this message