I should've noted that when I gain up the sensor with the intent of producing noise it's with JPEG use in mind. Thus the only RAW converter in play is the one on-board the camera.
-Dave-
I'm not so sure I'd want to hire
you for a photographic project, Dave.
Consider the following example. You get a call from a client who wants a noisy, murky, blurry shot for a specific customer who has requested an image that produces a nostaligic effect harking back to the early days of photography, for the purpose of selling a specific product.
You go to some trouble and expense setting up the conditions and hiring suitable models. The action begins and you take numerous shots, deciding to use the camera in jpeg mode and set to ISO 6400, perhaps also using a neutral density filter to slow down the shutter speed.
From the numerous shots you've taken, one is just right. The expression on the model's face is the most appropriate and you've captured the action well. The customer is delighted with the shot.
Some time later you get another call from the same client who has great news for you and excitedly tells you that another very important and wealthy customer has seen your blurry and noisy shot and likes the general theme and composition so much that he would like to have a huge, tack-sharp, noise-free print of the image. He'll pay big money.
Alas! You inform your client that you only took noisy jpegs on that occasion and that none of the images would be suitable to produce a large, normally sharp, modern-looking print with smooth tones.