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[Off-Topic: A Fluidic Model of the Universe](https://www.dsprelated.com/showarticle/1445.php)
Since it is a 3D+T model it should be renderable in most gaming engines/graphic toolkits.
Very accurate trajectories can be plotted at any point for either photons or objects by doing a Taylor series expansion at any point in space. All that is needed is the point and a velocity direction in case of the photon, and a velocity in the case of an object. The "Refractive Particle Steering Formula" (6) and the "Massive Particle Steering Formula" (58) will give the second derivative.
Formulas for higher order terms can be obtained by differentiating the acceleration equations with respect to time for even more accurate trajectory estimates. I'll be providing these in a later article.
If anybody incorporates this into a project, please leave a notification here.
Thanks,
Ced