Toon shader quality?

hi to all,

I build an android game that uses the toon shader for all objects.

it i is a strategy game. There is a camera that shows all of the map and objects from a distance.

When camera is distance from all objects, quality of them is very bad.

Is there the way for make better this graphics? Thanks.

here a diffuse normal. in this way objects are better.

hi. i solved my problem. it was a problem with scale of objects.
when scale was big, i obtained a bad graphics.