HDR in RAW format

Does anyone know if there is a software update that allows the D810 to shoot HDR "on" in RAW format? At this point it can only be used in tiff format and I would really like to be able to use that feature with RAW format images.

You can use Photomatix or Light Room to blend your different exposures done in RAW format, but the camera's software won't do it because it would take too much processing power.

rtobaugh1, Welcome!