Thomas Lake wrote:
> 
> Hmm this is an interesting discusion, I've been wondering what these
> settings really do, the pov docs arn't much help here. I'll have to do some
> testing to see how different settings affect different images, but I'm not
> going to play with this image any more.

In general lower pretrace_end leads to better quality, but very often
1/image_width is more than necessary.  It should correspond to
error_bound, there meaning a lower error_bound should have a lower
pretrace_end.  

Some suggested values are:

error_bound 3  => pretrace_end 0.08 
error_bound 1  => pretrace_end 0.02 
error_bound <1 => pretrace_end 0.01

but they only give a rough idea, for low error_bounds you will probably
have to try what leads to the best quality/speed ratio.

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other 
things on: http://www.schunter.etc.tu-bs.de/~chris/

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