In article <388A453B.C0CDC4E7@ida.utb.hb.se>, sa9### [at] idautbhbse 
wrote:

> Bjoern Jaeger wrote:
> 
> > Do you also have the problem with the clouds getting black in the 
> > distance ?
> 
> This sounds like the classical max_trace_level problem. Just increase it 
> to 500
> or whatever - that should remove the artifacts you're experiencing. (Look 
> it up
> in the docs for more info)

It isn't...it happens because the samples get spread out more and more 
as they get farther and the angle they intersect the cloud box 
increases. This can be fixed by making transparent vertical partitions 
to force more intervals to be made. Of course, this also means you may 
have to increase max_trace_level to get the ray past the partitions.

There is also a patch to fix the problem, which gives a keyword to 
control the distance allowed between samples(or was it the maximum 
distance before a new interval was started?), but I can't find anything 
in the MegaPOV docs about it so it may not be included. I think it was 
something like max_distance or max_interval_length. There were some 
posts about it a while back, about the same subject(media clouds), and 
it was created to solve the problem with media clouds. Sorry I don't 
have more info on it...

-- 
Chris Huff
e-mail: chr### [at] yahoocom
Web page: http://chrishuff.dhs.org/

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