And finally, with gamma enabled and natural film response turned off. As you can easily see, with this third image we have the most accurate result possible, deep black and a soft transition for the light. When the natural film response filter is applied, we basically "double" gamma our image (what the natural film response filter do is actually mimicking the way a physical film react to the light intensity, applying a post-render gamma to the image.

Note: of course, I didn't change the light intensity between the various picture, the beautiful light transition in the third image is only due to the way grays are "shifted" by the gamma settings.

People who renders interior in vue will LOVE what they will discover :)