Probably a simple answer, but I'm just beginning to attempt using flash outdoors. Using the 600EX-RT on a 5D MK III. Was shooting some street characters, some wearing hats, so I wanted to try to eliminate facial shadows. Since I was outdoors, I had the flash pointed straight ahead, seeing no reason to use "bounce" since there was nothing to bounce off of.
Got great shots, except for one thing - a shiny spot on the person's forehead, everything was illuminated just fine.
I never liked the "Stofen" type diffusers but with the flash in the forward position, any solutions to the forehead reflection?