Cube shows image same on all sides?

This is a copy of my answer Here : http://answers.unity3d.com/questions/306959/uv-mapping.html

I have listed all the ways to custom UV map a unity cube here : http://answers.unity3d.com/questions/294165/apply-uv-coordinates-to-unity-cube-by-script.html

Imagine looking at the front of the cube, the first 4 vertices are arranged like so

 //   2 --- 3
 //   |     |
 //   |     |
 //   0 --- 1

then the UV's are mapped as follows :

 theUVs[2] = Vector2( 0, 1 );
 theUVs[3] = Vector2( 1, 1 );
 theUVs[0] = Vector2( 0, 0 );
 theUVs[1] = Vector2( 1, 0 );

 //    2    3    0    1   Front
 //    6    7   10   11   Back
 //   19   17   16   18   Left
 //   23   21   20   22   Right
 //    4    5    8    9   Top
 //   15   13   12   14   Bottom

So where the UV's for Vertices 2 is ( 0, 1 ), so is 6, 19, 23, 4, 15.

You can test this by replacing all the zero's with 0.5, then check every face of the cube has the same portion of the image, and rotated the correct way (not inverted) . Note if standing at the origin looking up the positive Z-Axis, Right is your right.

for example this script would map the TOP of the cube to any UV coordinates of a texture you like :

 #pragma strict
 // TOP
 
 function Start() 
 {
     // Get the mesh
     var theMesh : Mesh;
     theMesh = this.transform.GetComponent(MeshFilter).mesh as Mesh;
 
     // Now store a local reference for the UVs
     var theUVs : Vector2[] = new Vector2[theMesh.uv.Length];
     theUVs = theMesh.uv;
 
     // set UV co-ordinates
     theUVs[4] = Vector2( 0.5, 1.0 );
     theUVs[5] = Vector2( 1.0, 1.0 );
     theUVs[8] = Vector2( 0.5, 0.5 );
     theUVs[9] = Vector2( 1.0, 0.5 );
 
     // Assign the mesh its new UVs
     theMesh.uv = theUVs;
 }