How u lighting the floor

Use a fill light from as far away from the subject as practical to cover the whole set. Balance that with your main/key lighting so that the image doesn't look totally flat
 
snapsnap said:
thanks for the reply i am using a 120 octa as key light and 2 lights for back drop. is it just a clean up in ps

That's lazy photography... Try to do it with lights and avoid the need for PS.

The reason you are getting grey is that those areas are getting less light than they need for a full exposure to make a white. Assuming the rest of the subject is correctly exposed, ask yourself how to get more light into those areas.

If you power the main light up where it is..... You improve the exposure of the floor, but over expose the subject......

Move the light away from the subject and power it up..... The area of even light spread is increased, and with enough distance will include the floor.

A fourth light would make this extremely easy, and also allow you to create lighting patterns that are a lot less flat than the three light set up you currently have.
 
That's lazy photography... Try to do it with lights and avoid the need for PS.

How can you say it's lazy photography ? sometimes it's not possible to get the floor white without PP, what if your working in small spaces with the Hi-lite, and have no room to move the lights back ie in a 14x12 room, which i have done often, if you try pointing a light at the floor, even at it's lowest setting you will blow the persons legs/feet, i for one would definitely prefer not to PP, but sometimes it's virtually impossible, and LR or PS is the only way to get it right, it can also be quite time consuming if you have lots of images, so it's certainly not lazy.
 
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