Is it possible to find or construct a `RegionPlot` out of `KnotData`? My motivation is to `Texture` the knots as per [here](https://mathematica.stackexchange.com/questions/236449/circle-packing-in-cone-texture).

After much searching and playing around, I found [this](https://community.wolfram.com/groups/-/m/t/401983), which frustratingly doesn't give the equations for the `inTinftube` and `onTinftube` functions.

Desired output is something like this (but in 3D):

<img src="https://i.sstatic.net/SLYSQ.gif" width="350" height="350">