Corona Renderer needs a vastly improved workflow for working with, what in Unreal Engine might be called, Exponential Height Fog; volumetric fog effects for interior and exterior rendering.
Corona Renderer, even with the Fast Preview Denoiser, is too slow to render these effects, so much so that it interferes with artistic experimentation, look dev, etc.
A cheaper approximation could be appropriate, with an option to enable physical accuracy (e.g. caustics), but altogether there needs to be a better method for this that doesn't require vastly more expensive hardware to render on.