But there's a picture just so you will read my question. It was a perfect day for photography in Little Rock. Any of my clients who read this, I promise to attend to your business as soon as it get dark.
Why does WB setting do anything in NEF mode? If I understand NEF, it means the camera stores the raw photon counts without altering the color balance or anything else. Okay, so why does the NEF image look different with different WB settings?
Oh, the picture. This has nothing to do with white balance. But if you think the D100 doesn't make great images ROOTC, you just aren't drinking enough.
A NEF file has the raw data, plus a set of instructions for how to display it, including the WB. If you change the WB, you change the instructions that go with the image. When you view the image, those instructions affect what you see.
Do nothing is not an option since the raw data is not an image; it's just data.
Take any image whatsoever in simple RGB mode (a JPEG or what have you). Same thing here in fact. The data is nothing but numbers. You need to now how to interpret those numbers. Open that JPEG in Photoshop and assing it the sRGB color space. It looks a certain way. The assign it Adobe RGB 1998 and it looks different. The data (the raw file) didn't change, only the way in which you are interpreting that data.