I’m running Ubuntu 14.04.2 x64 but I don’t think that has anything to do with it, just felt it would be good to know.
When I insert an image into my document it looks poor, with jagged edges, even in print preview, but the final output in PDF is good. One can tell the rendering quality has been reduced by default.
Applications like InDesign or Scribus have a performance setting where one can adjust the rendering quality of images.
Is there something similar in LibreOffice?