Hi Jason, thanks for responding so quickly. I think you may be on to something there. I ran the sku updater when i first installed SC4, and my app version says 1.1.638.0, but I'm not seeing nitelites in much (all?) of of the custom content i have downloaded, like the cobb buildings, andover tower, etc.
I have tried this both with and without simfox trunight plugin. I just reran the sku updater and get an error saying the old file was not found. I will play around with this, I think it might very well be the issue. Thanks for steering me away from looking at my model, I was going in circles there and the renders take a few minutes : D