
This was a shot that I did in my studio, I wanted to give it the feeling of being shot late in the day. To do this I used two lights one with a cool filter and one with a warm filter. The warm filtered light was set at about 45 degree angle to the background right of the camera, with the standard reflector and orange filter clamped to it. For the cool light I also used a standard reflector and clamped a cool blue filter to it. However instead of putting the cool light at 45degrees to the background I set a 5 foot by 2 foot mirror at 45 degrees left of the camera and bounced the light off of it . The mirror to gives the light a very directional look and will produce a sharper shadow. I set the model very close to the background so she would cast a shadow.
So what is going on here is the shadow from the cool light is being filled with warm light so it looks like a warm shadow and the warm light's shadow is being filled with cool light. When the two lights mix on the model and on the background they neutralize each other to some extent and make a white light. Changing the color of the filters and the power of flash will change the overall color balance. This is an example of how a shadows are a good opportunity to add some color. Please let me know what you think