in default size there was 32x32 but testing the scene rendering was 16x16...
in order to use a 32x32 i had to create a 64x64 and then to use the quarter of the pic in high on the right....so the render was the right tile in right size...

A B
C D
A=B=C=D=32X32 ...to use the tile as i created it...i had to create the same image but 64x64
and then, in mokup of the scene, to use (in this case) the A part of that pic...
And then in game test i could see my tile perfectly side and no more 64x64...
It's like i have a doublesize setting but i didn't change anything

thank you for the answer!