How Do I zoom out of the entire scene without it fading out?

I’m using Unity to create a map 32x18km. This will be used in a puppet TV show. The map contains five towns, and between scenes we want to fly into space to show the whole map, then zoom into a couple of puppets in front of a building. This TV series uses a simple combination of Green Screen with puppets and a full 3D background.

Unfortunately the scenery fades when I zoom out even a couple of hundred metres. We need to be able to see everything absolutely clearly even from 30 km away. How do I turn off this distance blur please? We do not have any plans to use the built in Unity Camera at this stage, and using it would massively slow down production. Please help. Thanks.

Oh no. I just looked at all the unanswered questions on this website. Nobody is here. There is no help coming. Unity has been abandoned.