Animation flickers with adaptive light.

[basherbas]

Hi Folks,

I'm trying to render an animation in an evening situation with 1200 light sources including vray meshlight, vrayIESlight, vrayDomelight, vray Plane light and vray sphere light. So basically all possible lights.
If I render with full light evaluation my rendertime is too high to finish on time. If I render with probabilistic light, the lighting is just simply terrible and dark. If I render with adaptive light the rendering is nice, but it flickers on some places in animation and it is too much to ignore. I read some previous comments and set my light cache to 3000, my sample size is 0,01 retrace is 8 and leak prevention is 0,8. My probabilistic light number is 8. Primary engine is brute force.
Any ideas how could I sort this out? Maybe simply increase light cache subdivisions?
Any help is appriciated.

Regards
Barnabas

[basherbas]

I tried with 6000 LC subdivisions and 0,005 sample size, it gives the same result.

[^Lele^]

*Carefully* increase the AL count (try 10, 12, and so on...).
Leave the LC to 3k for animation, and retrace at 8.

[basherbas]

Thanks for the help mate!

I just checked my latest test with adaptive lights, and it seems that unchecking affect specular and affect reflections on all of the vray lights reduced the flickering to a perhaps acceptable level while the lighting in an overview didn't change much.
I'll try to increase AL count if it's still too bad.

Cheers
Barnabas

[jacksc02]

Something sounds odd here.
I have rendered quite a few animations with adaptive lights and never had flickering

[basherbas]

I have vray 3.60.01 installed on my pc and on the farm. I'm running Max 2017 everywhere. My scene is a yacht in ocean, so there is a huge ocean around it, maybe that messes up the GI calculation? I'll give it a try what happens if I exclude the huge ocean geometry from GI.

[basherbas]

Okay, so it seems to me that mesh lights that cover a long and narrow area (running along the wall of a building through multiple rooms) makes the flickering quite bad. If I replace them with vray plane lights it seems to reduce flickering.