Changing maping coordinates for land..

[Lordremcok]

Ok here is the problem

we are making larger textures but nobody was able to change mapping coordinates
for land

for example if I'm making grass it is looking huge...so even in 2048 * 2048 it is not good
so i have to scale it to be so tiny , that finally in the game the quality is poor
For objects this is no problem, but for landscape...perhaps someone knows how to do it

here is an attachment to show you what i mean
on the left yoou see landscape the red square represent mapping coordinates
that fits the square, but if we could shrink it to 33 percent size the titling would be 3 times bigger on 1 Square so if you where playing the game from closer range the textures would be more accurate

Somebody knows how to do it ?