Observations and simulations of some divergent-light halos. 
We deal with some halos generated by the divergent light from a nearby source.  After discussing how the divergent light transforms some halo features, we give an outline of a method of handling the simulation of a divergent-light halo.  The simulation method is then successfully tested on some well-documented halo observations.  We also present a "simulation atlas" that shows halos produced by crystals of different shapes and for different light-source elevations and distances between the observer and the light source.  The simulation method also admits a three-dimensional visualization ofthe phenomena.