The first and most important aspect of your 3D rendering is the focal point or center of interest, the one spot in your 3D rendering where your eye ultimately ends up.
Once you decide what your center of interest is and where you want to place it, you can begin adding all of the other elements of composition that help your eye flow through the 3D rendering The goal in any rendering is to lead the eye to your center of interest.
It takes a lot of thought and careful planning to make all the elements of composition successful.