Does mesh collision not carry over between scenes?

I made some flat polygons for floors and then assigned them some simple collision after importing them. However when I used those same meshes again in another scene collision did not work anymore. Do I need to import the polygons with collision brushes in order for collision to be permanent?

@anonymous_user_a7158f7a Once you set the collision in the mesh editor, that’s it. You shouldn’t need to do it again…

Must be doing something wrong then :confused: