Game Object --> Cube Question

OK, I am making a tile game and used the cube game object. This cube is 1x1x0.25 so its shape is more like a floor tile then a cube; so now I will just call it a tile.

I created a material and added it to the tile. Looks good. Here is the question, when viewing this tile, I have the camera positioned so you can only see the front face and some thickness. The back face will hide a picture, when you click on it it rotates to show the hidden face and its picture.

How can I get a different material on the hidden face? Currently I am thinking of make the tile to be 2 tiles and glue them together. How would you do it?

You can’t apply different materials to the built-in cube object, but you could create a new object with a 3D app.Sticking two cubes together might be an option, but you’d have to be careful that the sides of the hidden picture cube didn’t look a bit strange (a very thin cube under the main tile would probably be OK).

Yup, the thin second cube is working fine. This is just a practice project so I want to stay 100% within Unity. I have never used a 3D app before. After I finish this, I will study Blender.

Thanks for the help