Getting a nice even background

[Charliedelta]

I have a question:

I did a shoot in studio with white seamless paper as background and on the floor. I had two speedlights for the background, and one speedlights with an umbrella as the main light.

I had the background metered at 1 stop brighter than the subject.

My background came out white, but the floor by my model's feet was grey. I didn't use any reflective sheet under the feet, as it's a studio I rent by the hour and they don't have it, they only have the seamless paper.

How can I light it to make sure the floor comes as white as the background?

Thank you

 

[tirediron]

Just point a couple of speedlights down at the floor, and adjust power accordingly.