Animating Lights

[dose]

Hey,

I'm trying to do a detail shot of a desk being hit by light through a set of blinds. What i really want to show is the blinds changing position over about 25 frames and the resulting sunlight brightening the scene!

I've tried doing the IRR map every frame, but have to set it to "high animation" to get any kind of decent results, and yet it still flickers!?!? I'm concerned that it's just going to take too long to render at 800x400!

Does anyone have any suggestions as to how to do this in something approaching realistic rendering times??

Thanks

D
This is a sample image from my scene:

[tom schuelke]

Hi dose

You´ve decided to do the most complex task that exists. changing light position is the most computational task you could chose.

No way to solve this easy and fast if you don´t have 50 computers.

we did this too earlier on an interior with max radiosity.

only way to solve this a bit was using several aftereffects filters to stretch the time between frames,to get lower overal times,and also to lower the flickering.

well l-map together with quasi montecarlo for this works good. if you´ve got enough time. the flickering gets as smal as pixels, so that flickering rather takes place as a grayny very smal texture overlaying the whole image. which is better as big areas changing each frame.

Tom

[Seraph135]

Looks to me like the blinds are blocking most of the light, and the little bit that is coming through is doing practically nothing to the overall lighting...Why not just render your scene with GI without that light, then render another pass of just that light without GI and composite it back in.

[dose]

thanks for the replies,

As i suspected, it's a bit tricky to animate GI, was just stupidly hoping for a quick fix! "Durr".

Have opted for a spot of cheating. create an IRR map when the blinds are mostly closed, save it, and re-use it for the ani as the blinds open, so the direct shadows change, and use an animated omni afterwards to sort of cack-handedly simulate the room illuminating.

we live in hope of hyper-gi....

D