Strange flickering in animation

[teabag]

Hello to everyone

We ve just finished a short animation of an interior to find out it comes with a very strenge flickering problem...
if u wanna have a look here is the download link to the mov file

http://rapidshare.com/files/56322005...icker.rar.html

does anyone know what causes this?

cheers

best regards

martin

[Dark_Arkon]

Do you use caustics through the window and or DOF?

What is the calculation mode for GI?

[teabag]

IRR/LC for GI computing each frame individually
no DOF in the scene
glass panes in the windows with affect alpha checked
refraction caustics used as set by default in the render tab

looks like spots from sun? maybe if we turn the sun to be invisible it may help what u think?

[Dark_Arkon]

Try to desactivate GI caustics. It may cause some problems with Irrad map.

There is some Bright dots in you image. Seems to be the GI caustics on the wood plane.

What mode do you use for Irradmap computation? the new animation prepass / render mode?

[m_hinks]

What settings did you use for your GI if done every frame. Looks like they must just be to low for so many ani objects?

[vlado]

I think your light cache subdivs may be too low; how many are they now?

Best regards,
Vlado

[teabag]

1500 subdivs at 0.02 size

[teabag]

this is all done with vray rc3

[teabag]

can u advise any otheranimation setting for moving objects animation?
QMC/QMC? that would make the rendertimes go skyhigh though

[teabag]

Vlado,
could u please have a look at the scene and its setup? as were really quite desperate about the flickering problem. if you could spare a little of your precious time i would upload the scene and PM u the link.

Maybe installing vray final would help but then were in the end of the project with about 20 scenes setup to go to the renderfarm....and i guess it would not be very good to switch between versions at this moment....

Thank you very much

Best regards

Martin

[vlado]

Ok, but you got to get me the scene somehow.

Best regards,
Vlado

[teabag]

sent u a PM...big thanks!!!

Martin

[vlado]

So I am trying these settings now:

High animation preset for the irradiance map;

2000 subdivs for the light cache with Store direct light OFF;

It seems ok, but I must render some of the more interesting parts of the animation.

Best regards,
Vlado

[teabag]

ok
thank you vlado for your effort!!

[teabag]

right, we have managed to resolve some of the flickering in the animation, however there is still some flicker in the shadowed areas going on as u can see on the animation below

http://rapidshare.com/files/57206834...s_NEW.avi.html

as u can see it is not that bad as the previous flickering, but still this cannot be really presented to the client...if u notice the small flickering underneath the cubboards....any idea how to get rid of that? possibly increasing more the LC subdivs?

Thanks a lot for any help

Best regards

Martin