i have scripted an Archicad-GDL - library-object for conceptioning tree-structure shafts - maybe within buildings for ducts or likely things..
Feel free to try - inform me about Your thoughts about it.
Youtube:
https://www.youtube.com/watch?v=fOXj5lsWreA
https://www.dropbox.com/s/sbw9x54emnbpcz6/Schachtbaum.gsm?dl=0
AC5.5-AC27EduAut, PC-Win10, MacbookAirM1, MacbookM1Max, Win-I7+Nvidia