glass - once again

[bernhard]

Hello friends !

Today I started to render an older car setup, and in the animation I have this problem:




You can see, that the first frame rendered the glass ok, but in the second one, something weired is going on in the reflection... hmm, or maybe it is the refraction...

well, it's really funny, some frames render like example one, some frames render like example two and I can't figure out what causes that issue....

what can it be and how can I fix it for animation ?

I already activated subpixel mapping and clamping, in the glass mat I checked Affect Shadows....


thx for very little help,

bernhard

[Neilg]

Looks like a GI issue - check if you have any non-vray materials in your scene that could be causing it.

[zoranm]

I, occasionaly, have this problem with smoothing groups. Some computers on render farm render one version and others the second version. Re-applying smoothing groups fixed the problem.

Hope this helps

Zoran