How to make fog around an object?

Question

3D

Hello everyone, I don't know how to make fog around an object in Cinema 4D, because the center is empty.
I tried to use some objects and apply material to them, but this is not it ..
In general, I need fog to smooth out the horizon, namely the transition from earth to sky (the object is earth, and its color is white)
I tried to do it through the physical sky and everything seems to be successful, but this is not a solution + those objects that should not fall into the fog get into the fog.
In general, if you can, then please tell me how to make fog around the object (s) ^-^