Help, colored artefacts

[FeD]

Hi

I have a big probleme with some renders since maya 8.5.
when rendering an animation I get strange flash colored spots on some frame, and never at the same place & same color....

Please do any one have a solution, I have to render 8500 frame next week.

There some screen I took from the layout made last weekend

-production settings : with fg 50 rebuild off in -b 30, an then in freez mod for the -b 1 .
- and anti-alias is mitchel

Thank for post your ideas or solutions

[SreckoM]

May be a known bug with interpolation (I tought it is only in Max), try to turn off interpolation on materials, then see what is happening.

[FeD]

You speak about relfection and refraction interpolation of the mia_material ?

Ill try it, it could be that beceause I think I have interpolation "on" on every buged material.. testing

thanks for the info !

[FeD]

it seems to work !!:)

thank you very mutch SreckoM

but now render times x2.. snif

[matt]

i got similar errors if i didn't have the mia_material connected to all 3 slots in the SG node (material, shadow, photon). my shaders were also using interpolated reflections.

[SreckoM]

I experienced these problems using MentalRay in Max, and read somewhere that this is bug which is reported to Autodesk, I think it is not problem within MentalRay.
But not sure realy...