how to create out of multiple niveous a single new SH3d file

[T_R]

Hello allout of my project with more or less 20 niveous , I like to copy a resulting opject in new SH3D file. The object is situated on 4 different nieveau. On my attempt to copy just all is no more aligned.

Is there a way to copy complete nieveaus or merge them to one?


Thank you for all helpful comments.
T.

[Puybaret]

There's no easy way to merge levels at different elevations.
I would suggest to copy / paste the objects at each level after hiding the other levels using Make level the only viewable one menu item each time.