Oh, had wrong link first, not the .png one. Now, the pic works.
So bilinear filtering, as it is described
"Bilinear filtering is a texture filtering method used to smooth textures when displayed larger or smaller than they actually are. Most of the time, when drawing a textured shape on the screen, the texture is not displayed exactly as it is stored, without any distortion."
I really dont see, how could I use this with two tiles transition. But oh well, have to do some research more. Thanks for the input tho .