All together we rendered about 3 minutes of animation for a marketing DVD. Initially we used a lot of glossy reflections, but had to cut it down since I had a lot of trouble getting rid of the noise while maintaining fast rendertimes.
Light cache: Yes, we did use light cache combined with irradiance map.
Initially we were using QMC for the aa, but couldnt get rid of noise within decent rendertimes - we need to do some more research on that matter - so ended up using Adaptive (0/2) and a Catmul-Rom aa-filter.
The original render is 720x576 @ 1.422 pixel aspect (for wide screen DVD) - and yes everything was rendered out interlaced - don’t know if you can apply interlacing properly in post.
The reason there are still interlacing noticeable in the animation posted, is that I havent found a good de-interlacing filter - Premiere’s certainly doesnt give you great results.
Average render times of the original frames was about 6-10 mins on dual Xeon 3Ghz’s.