You can make this with deviding it into parts - one segment after the other.
Or - You draw a cross-section of the "schell-form" as a morph and let it follow another 3D-Morphline
The workflow would be the same like in this tutorial:
( its german but You still will get the point)
https://www.youtube.com/watch?hl=de&gl=AT&client=mv-google&v=dZLTB2l4-f0&nomobile=1
Or - You draw this in sketchup - there are some free scripted tools for sketchup to develop such schapes - and then import the sketchup-object into Archcad.
http://www.youtube.com/watch?v=hi1IPnOoaeE&feature=youtu.be
Or.. Or..
This could be interesting too..
https://www.youtube.com/watch?v=1FPHjZ4esWE&feature=youtu.be
AC5.5-AC27EduAut, PC-Win10, MacbookAirM1, MacbookM1Max, Win-I7+Nvidia