Probably a long shot, but thought it worth suggesting. When taking photos in real life, I use a grad filter to create dynamic skies (or occasionally foregrounds) - particularly for architectural exteriors or landscapes.
I often recreate this in Corona with a simple plane with gradient map in front of the camera - but this can become frustrating with multiple cameras, and moving things around in a scene. I've linked the grad filter plane to the camera which helps, but still not ideal. With the Corona Camera ideally mimicking real life, could this be something that is integrated into the camera - similar to the Bokeh control (e.g. Value of effect, controllable by a map, etc)?
It can obviously be done in post, but it's simply not the same and doesn't give the same realism.