Raymarching is a special rendering technique that can be used to render "mathematical" objects that are far too complex for rasterization or even ray tracing. This can be strikingly beautiful on say fractals, since they tend to have simple mathematical descriptions and yet very complex shapes.
Raymarching on its own is also very interesting and worth checking out. Even better it is possible to do it in Unity! Packages already exist but are prohibitively expensive, difficult to use and do not explore the full potential. Perhaps we can change this in the future, but for now, enjoy some preliminary results.
Note that these are all rendered in real time in Unity! Doing so full screen does take good hardware but nothing too outrageous.