@sybren It's not the same as the system I used to use (remembered that was a blender script) but this site is very promising and far more customisable.

https://www.map2model.de

@sybren There used to be another one that also took in elevation data that gives a far more satisfying result but I can't find it right now. Touchmapper makes it look like I'm in the states instead of the highlands of Scotland.