Let's go first crazy with MagicaCSG and my little prog that you can use! https://editor.p5js.org/Pilou/full/y1GHaBqyT
Just make a transparent png image with some of your modules and drag and drop them !



A transparent PNG image with anything but also some free space!
and of course can be used with any moi3D objects! (my little prog not the MagicaCSG :)



And surprise following your inside image! 8-)