I've been using a 300dpi colour laser printer for these experiments.
Each level of zoom (full chip, macro, standard cell) needs a different layout properties file to keep the level of detail managable.
Results are here
- For the detailed views (macro, standard cell), I turn off all the fill and decap cells.
- For print - run this in (ruby) macro development: RBA::Application.instance.main_window.current_view.save_image("/tmp/filename.png",10000,10000)