Coloring Individual Faces of a Cube

Graphics Shaders & Materials
1

I’ve created a simple cube primitive and I’d like to individually change the colors of the faces ar runtime. I tried the following, but in just came out black.

// create a test cube
        m_object = GameObject.CreatePrimitive(PrimitiveType.Cube);
        m_object.AddComponent("cube");
        m_object.transform.position = new Vector3(0, 0, 0);
        m_object.transform.eulerAngles = new Vector3(60, 0, 45);

        Color[] colors = new Color[1];
        colors[0] = Color.red;

        Cubemap map = new Cubemap(128, TextureFormat.ARGB32, false);
        map.SetPixels(colors, CubemapFace.NegativeX);
        map.SetPixels(colors, CubemapFace.NegativeY);
        map.SetPixels(colors, CubemapFace.NegativeZ);
        map.SetPixels(colors, CubemapFace.PositiveX);
        map.SetPixels(colors, CubemapFace.PositiveY);
        map.SetPixels(colors, CubemapFace.PositiveZ); 

        m_object.renderer.material.SetTexture("_MainTex", map);

What’s the easiest way to accomplish this?

2

A cubemap isn’t for texture mapping a cube, it’s a cubed texture that you use for faking reflections in objects.

You can either UV map a cube in a certain way and set the colors of the appropriate pixels (depends on how you UV map it), or use vertex colors.

–Eric

3

if your less experienced with 3d modeling packages and texturing/uv mapping, you can simply extract the faces of a cube and treat each face as its own object (in Maya this action is in Polygons/Mesh/Extract). Export these six objects in one file and import in Unity. Apply unique materials to each cube face. Maybe group them in one Gameobject.