How to see a prefab from inside it?

Ok, i am making a ocean in my game. I found a much easier way to do it by myself instead of watching a video, but this doesn’t matter.

I already have seen many topics about this, but none of them was actually solved. Unity renders objects when you are “looking at them” but it doesn’t when you are INSIDE the objects.
Also, people say that you need to put a shader so Unity will render the object from the two sides, but i don’t think this worked at all. Does anyone knows how to make Unity render a prefab from inside when you are actually inside? Or force unity to do it? Something?

You need to turn off backface culling by putting “Cull Off” at the start of the subshader code.