I am importing building sites (.adsk files) into Civil 3D from Revit. Some materials render well enough, however, some materials are rendering as solid black. Editing the materials for these specific objects in the materials browser does not work, even when we convert the materials.
My coworkers and I believe this issue has to do with object type in Revit. Consistently, most walls look ok but curtain walls never do, regardless of transparency or material type.