If I have an entire building, full of furniture components and details drawn and saved as components, and I am rendering just one interior scene does Renditioner calculate for all the model, instead of just the scene I have on my screen? That would explain why it takes so long to render sometimes. Perhaps I need to pre-plan my fixtures carefully and just set up the scene I wish to render. Exterior renders are much less cluttered with components and are not so much of a problem, but excessive detailing across the whole building interior seems to be related to my "crash", and also I still have version 8. Skp files exceeding 10 mb, and approaching 20 mb have been common for me, but when I work at the 5 to 7 mb range the problem is controlled. Thanks.