Just stumbled accros something super annoying. I had an electrical plan which printed as a raster pdf. The reason apparently was that 'ambient shadows' were enabled'.
Here's the issue: I couldn't disable it! I had to change my view back to an architectural view, then disable the ambient shadows and then finally change the view back to an architectural view.
Why Revit, just why?
So please, if certain settings apply to a view, don't disable ability to change them.