GI brute force bug

[bigbossfr]

Hi,
We work on a feature film and we have some shots with boats and armies.
I have a problem with a shot, you can see the problem in this image :



This problem is here when i use brute force GI. It is just on 1 camera (i haven't this problem on others cameras) and just on 1 boat.

The problem disappear when i set the secondary ray bias to 0.005.

My question is : it is a bug ? What is it ? A optimization ?
It is just a curiosity because we resolved the problem with the secondary bias.

Thanks.

[Paul Oblomov]

Looks like you have very big scene in terms of distances between camera and other objects.

[vlado]

Hm, I'm not sure what it is - if you can get me just that part of the geometry to vraymaya@chaosgroup.com I will be able to tell you more.

Best reards,
Vlado