Interior animation - flickering issue

[Bobby Revolver]

Hi guys,

I have a flickering problem with my newly finished interior scene (which some of you might remember from an earlier post).

I tried reading through the big thread on flickering issues, but got even more confused as to what to alter

Here's a link to a very small sample to illustrate the problem (0.5 meg - 1 sec. long)

https://download.yousendit.com/Q01HTG0rdzg3bUJMWEE9PQ

At the moment each frame takes anything from 35-45 minutes to render. I have to do about 500 frames in all, so I'm really hoping my problem can be solved without increasing the rendertime too much...

Below is a screen grab of my settings:



Hopefully one of you more experienced users can pinpoint the problem easily.

thanks for your help!

Anders

[Bobby Revolver]

Dang... I meant to post this in the problems section. Maybe a kind soul can move it for me... Sorry

[Codi]

If the only thing that moves in the scene is the camera you should render using precomputed Irradiance maps, check this tutorial from the VRay help:
http://www.spot3d.com/vray/help/150R...ials_imap2.htm
or search here in the forum for walkthrough animation, you'll find a lot of posts

[Bobby Revolver]

Thanks, but I have a couple of moving objects in the scene and opted to do the calculations frame by frame instead. The time spent on calculating irradiance maps is only a fraction of the actual render (granted, it would of course shorten the render somewhat over 500 frames)

[Codi]

Then, if possible, render the static geometry with precalculated Irrmap and composite the moving objects in post.
Otherwise you can try to render in animation mode instead of single frame, check this thread for a good discussion on how to use it:
http://www.chaosgroup.com/forums/vbu...animation+mode

Cheers

[Bobby Revolver]

The thing is, I have a couple of moving objects in the scene that cast very long shadows, so from what I understand I wouldn't gain tremendously from compositing... I'll try fiddling with the settings based on the long flickering post. Thanks!

[mike_kennedy]

Calculation of LC on Single Frame will flicker for sure, We normaly use Fly though and Pre Calced IMAP and then Rerender the moving Objects (Which WIll Flicker) soloed with the rest of the room / scene removed or set to Matte and then compsotite. The Animation Pass system takes a long time and so does your method because you have to load and filter the imaps for every frame.

[Bobby Revolver]

Ok. I've now tried doing it with animation (prepass, then rendering) for the Ir-map and fly-through for the LC, which definitely helped on the flicker (though it's still noticeable), but also made the image much darker (see below).





I think I'll try to set the IR-map to multiframe incremental and see how that turns out. I did a testframe and the lighting wasn't darker using this method.