yes and no
No you cant make an object with dashed lines but you can script around that limitation.
Basically you can make a line appear in 3d using the LIN_ command. Make a line that is a series of short lines and save as a macro. Tip: use a looping function and your line can now be any length.
The solid element needs to be maskable so make your prism_ (not a block)and mask all the edges and "call" the dashed line macro in the position where the prism edges are.
Cheers John
John Hyland : ARINA : www.arina.biz
User ver 4 to 12 - Jumped to v22 - so many options and settings!!!
OSX 10.15.6 [Catalina] : Archicad 22 : 15" MacBook Pro 2019 [/size]