Hi, I’m a newbie at Unity 3D, and I was just wondering if I could use the plane as a layout grid for materials? Is there any way I could assign a material to each square on the 10x10 grid? If not, is there some easy way to declare an array of squares and make them side by side? Thanks!! 
You might be able to write a script to generate your own mesh and/or access and change the UV map for your mesh, that way you can define your UV’s and assign multiple materials to affect different areas of your mesh. Or go into a 3D package and do a similar thing.