Collider's

Hello Unity Community,
I am working a bit in unity recently and I’ve created a 3D Level in Blender, I’ve created this level as one plane. Now to the question, is it somehow possible to give this level one collider straight, where it’s defined that Mesh=Collider or do I have to part the level in parts and give every single one the colliders manually?

You can try using a mesh collider and test how it performs.