Kojima was back in Soundelux Studios in LA to continue recording sessions for Metal Gear Solid V: The Phantom Pain, working on more voice recording and facial capture for Stefanie Joosten’s character Quiet.
Another tweet by Kojima reveals a making of is being filmed as well.
We are having limited space in studio as having a cameraman today for "Making Of".
— HIDEO_KOJIMA (@HIDEO_KOJIMA_EN) September 10, 2013
It may be something that will be included with the game, but that remains to be seen.