Yes, when you plot you have to select the Raster and not the Vector setting, A fill in revit is a raster image. Which brings me to photoshop illustrator, why can you print a vectored fill in that program, or even closer to home, AutoCAD is a vector program, why can you print vector fills in AutoCAD and not Revit. Huh, same company, interesting.
I once got an Autodesk rep on this discussion page fired up by insinuating that Autodesk follows their own agenda. HE said that is not true and that they try to listen to the customer, Apparently Autodesk didn't see the customer generated wish list.