Short version: Do extended passages of italics give readers headaches? Long version: An idea that struck me yesterday calls for the main character to constantly daydream. He toggles back and forth between the real world and the one he's made up for himself in his mind. I'm probably going to end up writing the story in past tense (Unsure about POV), and the daydreams seem to want to be present tense. However, I'm not sure that's enough to differentiate them from the "real world" sections. Another thought of mine was to use a line break and put the daydreams in italics. But I've heard that long passages of italics are turn-offs to readers and publishers. Will the italic passages--anywhere from a paragraph to a page or two in length--throw readers off?