By the ocean
A simple setup for this one. Model, sea, fake sun :) Sorted!
My model Sarah-Jane is shot against a neutral grey background and composited into the scene.
All backgrounds are themselves composites of various elements to create a 'hopefully' dramatic theatrical quality.
Strobist:x1 Einstein640 boomed high just off centre right. x1 AlienBees AB800 camera left and x1 AlienBees AB1600 camera right to provide kicker light.