Solution of the localisation Path for the Domes files tmi above so you put them inside!
"C:\Users\your_user_name\Documents\Twinmotion2019\UserLibrary"

Thx Tenrev https://www.biblio3d.com/t12331-twinmotion-a-la-recherche-du-fond-perdu#149154
at the Forum Biblio3D https://www.biblio3d.com

Stay the problem : how generate new landscapes 360° like the domes above?