I believe your concern is due to water clarity and the spooking of fish if using straight braid. I use braid exclusively, with a fluorocarbon leader. Not for the invisibility factor, but more for abrasion resistance. Braid doesn't do well when rubbed up against cover and/or fish teeth. Fluoro is far superior in that area, which is why I use a 3' - 4' leader ahead of my braid. This way, I can better determine when abrasion has started and snip off an inch or two and retie. JMO.
"A voyage in search of knowledge need never abandon the spirit of adventure."