Go to Project Settings > Image Loader and untick the Filter option. This only applies to new textures, so for the ones you’re already using, edit the texture in the Inspector and untick Filter under the Flags option.
Thank you for the answer, but i already disable filter.
Before, it was blurry like this :
Azzarc | 2016-07-04 14:30
I believe that changing the Image Loader options apply to existing textures too if they haven’t been imported, but are loaded directly as PNG (unless they have custom .flags files I guess). At least in my projects if I change those options I see the difference directly on all existing content.