Tree Distance, place tree with editor

Hey guys. I have a problem in my game, I put the trees with the the terrain editor of unity are of poor quality at a small distance and that quality changes only when I approach, along the tree. I have the preference of the land around the maximum and still does not solve my problem.

Thanks :D

Trees get better quality when you approach them because of billboarding. This converts trees to 2D images while far away to increase performance. See this question for how to fix this (Change the distance at which it's billboarded to a high value)

I am having the same problem, and I don't know how to fix it either. It might be unfixable.