Rendering with blender cycles, I noticed the option "exposure" under the "film" section in the rendering menu. Clearly, increasing the exposure value increases the image brightness, but does anyone know what function is used?
Naively, I'd expect increasing the exposure by a factor of
x would be equivalent to multiplying all
RGB channels by a factor of
x, either before of after applying an image gamma.
Is this hypothesis correct, or is a different function being used?