For example, to overlay three different 3D radiation patterns of three different antennas over the 3D model, where each radiation pattern's axis is different. Also, each antenna is not excited simultaneously that is, each at a time.
I don't know if it's possible to overlay field plots, but in my opinion overlaid 3D radiation patterns would look too cluttered. It's best to show each 3D pattern separately and perhaps show the radiation patterns of the multiple antennas in 2D cuts.