flickering problem in mental ray

[Robin3D]

I'm making an office animation in Mental Ray with use of a daylight system. Now, the animation is done, only rendering. But when I render, sometimes objects seem to flicker. Sometimes you hardly see it, sometimes the whole scene does. I made an animated gif to show you what I mean.

 

Is there any way to fix this?

 

[Ky Lane]

Are you precalcing FG and Photons?

[nelpiper]

As Ky said.

- set your GI the way u want

- generate photon map

- set your FG the way u want

- generate FG every "X" frames (10, 20,50, etc)

- freeze FG

- render the scene

You should have a flicker free animation. Good luck.

[Robin3D]

Thanks for the quick replies. I'll try it in a moment. I'm kinda new to Mental Ray (first animation, done stills before) so I have still to figure out some stuff.

[Robin3D]

I countered some problems. I never enabled GI in the first place. I never worked with GI and photons before. When i enable GI the scene looks somewhat different, but it looks fine. However, the Photon Map options are grayed out (not clickable). I tried enabling some check boxes but it doesn't seem to help.

 

Settings in the attachments.

[Robin3D]

Problem solved. Simply locking the Final Gather re-use was enough to fix the flickering.

 

Thanks for the help!

[davetyner]

I know this thread is a tad old but I am having this issue as well...

 

Did you pre-calculate your fg for all your shots from the same computer? Does anyone know if that matters?

 

Thanks,

 

Dave

[Justin Hunt]

you can pre-calculate over several computers via net rendering.

[davetyner]

OK thank you. I am net rendering the FG map but thought I had read somewhere that you had to do it on the same computer for it to be consistent. I am just not having any luck with the results.

 

I am looking at going with strait up HDRI as my sole lighting for the scene. It looks pretty good, there is no flicker, and I am out of time.

 

cheers