Multimatte causes all lights to blow out

[chris-x//]

Hello,

I have a strange problem here, the fact of adding a multimatte channel in the render elements causes all my light to burn at render. If I delete it, all is fine.

Using vray 1.5 sp1 and max 2008, all 64 bits.

A simple scene and everything works, but not in that one which is kinda heavy...

Any idea please ?

Thank you very much

[vlado]

It would be hard to figure this out without a scene really... if you can send some portion of the scene that demonstrates the problem to vlado@chaosgroup.com it will be useful.

Best regards,
Vlado