Yes shooting outdoors using natural light or a little fill in, is far more challenging in my opinion than shooting in a studio or using a full lighting set up outdoors. Also the results can be awesome if doe right. I never could but know guys who can.
This shot illustrates the problems, girl squinting, might be roasting and not happy. Plus you're having problems. Also the background is too interesting, should be more out of focus.
Perfect and I'm envious.
