How to change reflected environment

I personally miss the ability to adjust the reflectiveness of the model, the light (lighter / darker) settings, and the "shadows" undeneath the model. The orignal model, expored as OBJ, constains settings for reflectiveness, wich is being ignored by Aero. Instead it uses a standard setting, which in my example means thet the elephant is too shiny, and the car is too dull, and I have no way to adjust it. It's good to have basic shadows, but when mixing it with a real background, it becomes obvious that a setting for shadow darkness and exposure would help a lot to make the mix between model and background look a lot better.