I took a block model/Minecraft model to use the model in a test game with animations, etc.
#Why is the texture so smudge?
short hill
runic snow
By default, Unity applies filtering to textures to smooth out hard corners.
If you want to avoid this, go to your texture's import settings and change the Filter Mode to Point (No Filter).
spare juniper
Compression doesn't change the blurriness but for pixel art style textures, you may want to disable that too to avoid compression artifacts (pixel colors will change a bit from what they were)