Kim Hill at Pink Ink Studios (find all of her digital goodies here) has a fantastic action if you’re
doing any kind of studio shots. It really helps to remove all of the gray you may get
when your lights aren’t positioned properly. It’s super simple to use…and if you
don’t get enough ‘white’ the first time, you can flatten your image and run it again.
Here it is used on one of my shots where I forgot to move the lights for my ’shorter’
subject, Tucker 
You can find this action in the shop at Pink Ink Studios right HERE.
