object ID & material ID's

[cdavis]

Hi,

I am working on an animation of a car & I have several multi mattes setup with material ID's & they all work great. But parts of the car are grouped together under locators/groups & I want a matte for each section. I can usually assign a object ID to these & have it show up in the multi matte. But all i'm getting is black, wondering if i'm missing something obvious or if anyone has a suggestion ?

Thanks
chris

[Morbid Angel]

If you are applying an object ID to a locator or a group that wont propagate down to the objects it just does not work like that. What you can do is assign vray object properties node to those objects and override object id that way. For each group you can have its own obj property node.

[bigbossfr]

Or you can use user attributes + extraTex.
It will give you the possibility to have hierarchical mattes.