Rembrandt Tips

Its no surprise that the word photography derives from the Greek 'writing with light'. For glamour use front light, for safety use 45 degree light. For art, use 90 degree light. Ad for edgy theatrical type light use 120 degrees.
That's fairly easy in the studio but more tricky outside. Not only do you have to find the light hitting your subject at an acute angle but you need to reduce or eliminate all the front light to maintain the contrast and drama. I used a  tunnel for this shot in a private tuition group.
You may like to practise with a watermelon or pineapple - they don't get bored or have an emotional reaction. When you get it right swap the melon for a real live human being.
Tech info;
Nikon D700 50mm prime lens
1/320 sec f2.8 Aperture priority; 400 ISO EV -2.0