One light portrait

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I created this portrait with one light source, and here is how I did it.

I used one 5 ft photek soft lighter umbrella with a strobe inside. 
One black foam core board for the background, and two white foam core boards on both sides of the model. I placed the light source above the model and about 1 ft away from the model, and that was it.

One light source? Yes, but multiple way of manipulating said light source to achieve was I was looking for.