PNG file as terrain texture

Hi all! i’ve a png file map create using RPGMaker.When i put that like texture it became less detailed with a lot of pixel. So bad quality… How can i use that without compromise? Thanks!

Have you tried increasing the resolution of the texture in the importer(its 1024 by default)? Maybe change it to truecolor.
When you import it into the terrain make sure to set the tile size to that of the texture.