Terrain Texture Size in TGEA

I notice in the demo that you can use larger textures on the terrain in TGEA, but unfortunately there are no mapping coordinates so you have to change the square size, then from what I understand, if you make the square size smaller, the game becomes unstable. So here we are again with crappy ground textures. Is there a way to scale the mapping coordinates in TGEA terrain so we can see some detail?