I had a lot of issues with the default render engine, especially the quality of the image (yes I disable ceiling lights and add lights myself) ..

I got strange art-effects, white spots, dark spots -> know issues, never get fixed. I really couldn't found any solution. Exporting & importing to Blender is an alternative way, but way to complicated for now. . Until I found this plugin. Although I have still strange white spots with this plugin . It could because of my chandelier (lot of glass)...