Interior animation moving objects

[pg1]

I have just been brought in as a contractor to work on an project that flys through a house from interior to exterior as the house builds itself.

It has all the things that GI hates, moving objects, scaling objects, slice plane objects, opacity based wipes of animated growing, lights turning on and of course a day to night transition all while the house builds itself around all these objects. I am concerned about getting a clean GI solution.

The company I am working for has never done this before and don't really understand how difficult it may be to get a clean render.
The render farm is tiny so I am reluctant to try BF Light cache as I don't think I will be able to get it clean of grain in a reasonable render time.

This is an animation that I helped with ages ago using a high quality single frame Irmap (not prepass animation Irmap)
http://www.youtube.com/watch?v=OapU1...layer_embedded
and it was reasonably clean but the render times were high.

I have just started looking at turn off GI and using the Vray ambient light as a backup plan. It seems extremely promising, fast and no GI so no GI moving object problems.
Anyone got any experience with this? Hints and tips?

[devin]

I've rendered out similar animations using IR (animated prepass) & LC (fly through) but it can be difficult to get a flicker free result so if it's a real important job I'll usually use BF unless there's a real tight timeline.

[super gnu]

if somebody wants an all singing-all dancing animation like that, they either have to pay for it (i.e. you can hire time on a renderfarm) or you have to manage their expectations and give them test renders early on, showing the result you can get with the vrayambient approach.