03-24-2014, 11:52 PM
With the Muslin and trying to get it white, for what your doing, is its like trying to grow grass without any water.
What I mean by this, is your subject is lit up via Flash/Light but its not on the background. You either need to have the SB-200 flash off the hotshot and behind the subject and have that light the Muslin up with the use of another light on the subject for the actual Portrait shot.
No amount of setting change will do what you want, without going into PS and Masking and Adjustments on the Muslin, or using your Lighting better than you are.
The SB-200 isn't the strongest of Flashes, but if you use it correctly, at the back of the subject Wirelessly, and then use the 3200's pop-up flash, then I think you will get markedly better results.
The problem with doing the adjustments you want in any program, is you have the great possibility to blow out the background, while trying to keep the image as perfect as you can.
You can also change the White Balance in camera on the 3200 so instead of using Auto, try and change it around. You can do this by looking on Pge 69 of the Nikon D3200 Manual.