The Ray Trajectories plot is a default plot that shows each ray as a line in 2D or 3D. The final ray position can be rendered as a point or vector. It is also possible to modify the Ray Trajectories plot by adding the Color Expression, Deformation, or Filter attributes.

As an example, when the ray intensity is computed, you can also plot polarization ellipses along the ray paths, using the built-in variables (gop.pax, gop.pay,gop.paz) for the semi-major axis and (gop.pbx, gop.pby,gop.pbz) for the semi-minor axis.