I've just started using nXt in the last month, but have used Accurender since 2004.
I'm trying to get a handle on render time and the use of lights.
The attached image is a reasonable example of both.
1) This image is set for 3072X2304 pixels. 28 passes took 24 hours and 12 minutes. This is a little higher res than we usually use for web presentation but the same question applies: what can I do to reduce render time?
2) There's something about the math for lights turning on that I'm missing. The light in the service counter under the "u" in "cmu" failed to turn on. it's a duplicate of all the ones on either side of it, which DID turn on. With 140 lights in the image, I figured by pass 18 they should all be on if I'm running at 8 lights per pass.