That is as true for fiction or non-fiction. The writer has to really know their subject. It is really important to remember that the readers are a lot smarter than the writer. Also, good writing has to do with rewriting. You will never get it right the first time. So you rewrite and rewrite again until you get it right. Until you, and the reader, will be able to visualize what you're writing about.
Michael ScottWhen I said that I was king of forwards, you've got to understand that I don't come up with this stuff. I just forward it along. You wouldn't arrest a guy who was just passing drugs from one guy to another.
Michael ScottWhat you call magic is nothing more than an act of the imagination fired by the senses, then given shape by the power of your aura.
Michael Scott