Hi everyone, im really new to this so would really appreciate any help.
So I am creating a landscape and I am trying to add a texture to the map. I feel like i have managed this well using one of the free textures. See sand:
Material map for free texture
See comments
But I would like to add my own that I make in GIMP. I have exported the free file to check pixels etc and I think I have kept it all the same, its the same file type etc but it doesnt seem to work. See sand:
See comments
Material graph for own texture
See comments
I am left with a very noticeable square texure even thought all I have changed is the file image and nothing to do with the code
Can anyone see what im saying via my pictures? And help, I have also added images of the material graph of each so you can see what i have done for each and maybe whats wrong or whats missing. Any help would be very appreciated, I have tried so many videos and tutorials. I am not looking for it to be realistic, just dont want it squared and look the same as the first image.
Thanks 
I have had to add the pics into the comments as i am only allowed 1 media file
