Seamless tiling of automatically textured planes

I’m creating tiles using the plane primitive of Unity and I’m positioning these tiles next to each other and assigning a texture to each one. Example:
alt text

As you can see the seperation between one plane and the other is clearly visible. Is there a way to fix this?

PS: I’m of course creating these by code. It’s a dynamic map that loads according to where the user moves.

Solved. In case anyone is wondering, this was caused by a slight repetition in the textures so I had to set

p.renderer.material.mainTexture.wrapMode = TextureWrapMode.Clamp;

in order to avoid tiling.