Hello i'm a french student in game developpement and i have a project to do on houdini and to put in unity.
the goal of this project is to make a(n) scene/environnement with the maximum of procédural paramètres.

i made a first version and i wanted to import it in unity to see what it looks like but i have an error and i cant figure out how to fix it so if someone know i'm really intersted in some help.

i put all screenshots i dont really know what you need to see the problem.