3ds max to unity

Unity Engine
1

Hello,

how can I do colision in 3ds and import to unity?

Ex.

I do a model, a wall in 3ds, and want to do another wall that will be the colision.

How can I do that?

Thanks

2

Just Have both objects and export them into unity using FBX, also you can just place max file into unity and automatically import it from there, once in unity you add a Mesh colider to your visible Wall and in the mesh colider options look for where it says mesh, then change it for the mesh you imported to be colider.