3D Text visible from/in x distance/place

Hi. I want to make 3D Text visible in x place which I can choose - so if I'm not inside this place which I've chosen then I can't see this 3D Text. I'm new in unity so I even don't know if it's possible so please let me know about it.

or

Make 3D Text visible from x metre. Example : I'm 50 meters from this 3D Text then I can see it but if I'm 100 meters from this 3D Text then I can't see it. Just set visible for x distance.

When x is value which I choose if someone didn't get it.

In need it because I've put shader on my text but it can be still visible through trees as they are not so much density, I think tho.