Hey,
i was recently rendering a scene with an object that has the mia_material_x kind of material.
i was splitting the scene into passes, and when the render was finished, a lot of the render passes came out total black and i didn't know what was the problem, until i've upgraded the shader to mia_material_x_pass and it all worked out.
but my question is, why not using the mia_material_x_pass from the first place? even if your'e still not sure if you'll render out your scene in passes.
how does it differ from the mia_material_x?