overwrite materials

[kubbah]

Hello, is there a possibility in revit 2010 to overwrite the materials for a given render? ?
I mean,
For example, I would like to make a render with all the same material without having to change materials to each of the elements (which there are about 80 thousand )

thanks for the tips

 

[gfrank]

I don't think you can.
the same name can be combined with only one material