Having issues with trying to render Mechanical Rooms in Revit Arch and MEP. I want to make the pipes render the material they are. For instnace, water pipe would be copper and gas pipe black steel and so on. Yet all I have in Object Styles is "pipes" and must globaly change all piping to the same rendering material.

So in MEP, I removed the main 'pipes' catagory material and created a subcatagory to match the Pipe Type name but that material does not render diffrently. I renamed the subcatatory to match the pipe material [carbon steel] and still no change in the rendering.

So, is there a way to render pipe and fittings diffrently by flow stream?

Thank you