I tried to get a picture during a solar eclipse / stellar occultation / planetary occultation I knew about, and it didn look right. Why is that?
For eclipses / occultations, there are likely to be significant differences depending where on the Earth (or wherever) you are standing. The simulator renders images as if you were only at the center of the viewing body. Also, light time is not included yet in the body positions, and this can have potentially noticeable effects for multibody or distant occultations.