[Radiance-general] Ambient exclude transfomed material in instances

[Gregory J. Ward]

Hello Iebele,

Since you have too many materials in your "ambient exclude" list,  
you're best hope is to switch to an "ambient include" list, instead.   
Create a file listing all of the materials, hopefully not xform'ed  
and duplicated like your leaves, that you would like to include in  
the interreflection calculation.  These can be put in a file and  
incorporated with a single -aI option.

The other alternative is to switch off the irradiance cache using -aa  
0 and assign other parameters to make the problem tractable over all  
surfaces.

-Greg

> From: iebele <info at iebele.nl>
> Date: April 2, 2007 9:08:03 AM PDT
>
> Hi,
>
> I have a complex scene in which I use instances which I want to  
> exclude from ambient calculation.
>
> The problem is that I use !xform  ..... with file A that include  
> materials to create another file B  that is later used as an instance.
> I need the materials in file A excluded from ambient calculation.
> The exclusion does not seem to work in my case, which makes the  
> rendering times enormous ( lightyear - 0.01 % progress per hour in  
> the picturel, very very much rays )
>
> Any help is most  welcome.
>
> -Iebele