[Radiance-general] Splotchy renders

[Fitzsimmons, Rob]

I finally am playing around in Radiance - OS 10.5.1 and getting some o.k.
results.
However, I notice a lot of the renders are really spotty. 
http://www.geocities.com/SoHo/Lofts/5684/images/354_2002.jpg

In rpict, I've tried -ab 200 and -ps 5
Also looked at the list archives and tried compamb, but get these errors

[localhost:~/documents/radiance_stuff/strata2rad] robfitzs% compamb -c -e
354.rad
354.rad: unknown variable: void glow dim
354.rad: unknown variable: void glow dim
rpict: system - cannot expand '@/usr/tmp/ca3355.opt': No such file or
directory
rpict: 0 rays, 0.00% after 0.000u 0.000s 0.000r hours on localhost
/usr/tmp/ca3355.amb: file not found
cavg: Subscript out of range.

Thanks
Rob