For pixel art, it’s better to disable all the flags and set the storage to Uncompressed. I think your problem is the Mipmaps flag.
I guess you don’t talk about the Repeat and Mirrored Repeat flags, because they look so useful for backgrounds…
Bojidar Marinov | 2016-03-07 12:23
Hey, I just realized the problem is coming from my texture after I post the question here.
There is a feature called onion skin in my pixel painting software, and it did the blend effect on my texture and I didn’t even notice that ( the texture is too small for me to find the tiny different… ). So it’s not the problem of godot.
Anyway, thanks for the reply, it might be a good advice for me to make a pixel game.