In this Light Painting Tutorial Erin Simmons shows How To Light Paint Silhouettes on a White Back Ground.
Erin uses a White Bed Sheet as a backdrop and illuminates the sheet using from behind with his most powerful flashes to create a completely white background. When Erin or a model stands in front of the sheet they will create a silhouette that you can then fill in with Light Painting effects.
Settings to start at are ISO 100, F8 shooting on Bulb Mode.
The Light Painting Tools Erin uses are from: https://lightpaintingbrushes.com
Some tips to keep in mind is make sure the light from your flashes is strong enough to make the sheet completely white. If you have less powerful flashes or only one flash you can adjust the setting on your camera to allow more light to be recorded. If you find that your subject is not dark enough to create a silhouette because of the light spilling off the sheet have them move further away from the sheet and closer to the camera.
Erin also talked about his silhouette technique in our Light Painting Brushes Live Event, you can catch the replay here: https://youtu.be/0Nd4ATJCvKs