Warning with materialOverride ambient occlusion?

[Anonymous]

I'm struggling to understand how to use Arnold and Render Layers. I created a layer with the geometry from the character rig I"m using and the background plane. I then added a material over ride to that layer using the arnold ambient occlusion shader and I get this warning that I do not understand:

# Warning: Failed to make connection for material override materialOverride_AO. Note that per-face assignments are not supported with material overrides.

What is per-face assignments? I noticed that the ambient occlusion is applied to the background which is native to the scene, but not the character rig which is referenced in. Does this have anything to do with it?

Any help would be appreciated.

[Stephen.Blair]

per face is "per polygon"

This looks a lot like an already logged Maya issue. Not sure if there is a workaround...are there any per-face shaders on the objects? If so, try removing those.

[Anonymous]

Hi, Thank you for your reply. Does "per-face" mean a shader applied just to a single face on the geometry? If so, then not to my knowledge. I've pretty much used variations of the Arnold standard shader for everything. You say this seems like an already logged issue-- can you give me more information? I'd gladly search the forum if I knew what this issue was called.

I'm completely out of my wheelhouse with texturing/rendering if you can't tell 😉

[Stephen.Blair]

It's not an Arnold issue, and I don't think it's come up here before. It's a Maya issue, logged by the Maya team.