To make a very big map

Do you use Umbra? How exactly is it set up at presently? You really ought to give us more details

I make the map in Unity3D. I don't use another programs and utilits to make the map. I only make models of desain with $$anonymous$$aya: trees, houses, cars.

Are there another methods to make a map? Can you tell me about them?

No he is talking about "Umbra". A feature within Unity that only renderes the parts of the map you see. Thus creating better performance.

Unfortunetly this feature is only available in the pro version.

$$anonymous$$ay you tell me more about this feature? What does it do?