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.