[Radiance-general] rpict memory usage keeps increasing with -aa 0

[Mark Stock]

Radiance whizzes,

I've upgraded to 8 GB of RAM, so, naturally, I found a scene that 
needs all that space. The rpict is eats up 4.6 GB initially, but 
even with "-aa 0" (turns off ambient caching, right?) I am still 
seeing my VIRT and RES memory sizes growing. They are at 5.3 GB 
after only 10 minutes of rendering. I am worried that I will not 
be able to render high-resolution images of this scene now. How 
can I prevent this?

FYI: the scene is composed of a sky and 407 "instance"s of 
separately-compiled octrees, each with 20k-100k primitives.

Mark