How to install the material presets?

[Anonymous]

Sorry if this is a noob question, but I am new to Arnold, so:

I was hoping to add the free material presets and I've downloaded the material presets (Ai_materials.zip), which inside has a material_scene.ma file in it. But what to do with that? If I try to open in in Maya it says it contains Mental Ray nodes and mental ray isn't loaded! The presets use MR nodes!??

Something says to me this can't be right, so maybe some instructions would have been nice, but I'd appreciate any help on what I'm missing.

[Stephen.Blair]

The material presets are already available in Maya. You don't need that scene file.

In the Attribute Editor for a standard surface shader, click the Presets button.

The scene file was created back in the old days, when Maya always had mental ray. So any scene file saved would have mental ray nodes. You can ignore that error.