Aye, when I'm at home it rarely switches to bounding boxes on my pIII 600's, but at work on a pathetic pII 200 it's always like that. 256MB of RAM apiece vs. a mere 64 MB on my work machine. At work, I run into file size barriers all the time, and it's not due to free cache space but I assume RAM itself. A 70 MB file running with only 64 MB still runs fine, it just caches almost the whole time. I end up only creating materials and skies at work, then e-mailing them to myself for use on my home systems.