Actor 'head shots' studio work?

Ok well iv been acting for atleast 10 years and what iv been told by casting directors is that the lighting and angle are a big part. You need to make their eyes be the center point and have angles to highlight them (eyes) it needs to be mysterious. Make sure that there isnt a mive like space othere than their head and shoulders...maybe to there sternum? Good luck! It wont be too terribly hard to do!