resolution/aspect ratio independent bg texture

Hello,

I'm trying to make a resolution/aspect ratio independent GUI and I want to have a image that is behind a GameObject that is in the scene. Here is what I have tried.

1. Make it a GUITexture. That didn't work because it wouldn't float, plus it covered the GameObject in the scene.

2. Just make it a regular object and place it just above in Y space (top down layout). This was successful in being behind the GameObjects but was not when the scene changed it's aspect ratio.

3. Write a script that will look at the Screen.width and Screen.height and pass the desired vector3 placement through a camera.ScreenToWorldPoint() operation so that it will find the correct X and Z values to match the other GUI elements (which I have successfully placed and scaled. I am missing something here, and I haven't found anything in the forums that deals with this specific issue. Here is the code for the failed attempt.

var prefab:GameObject;

var quickSelectBackPlacementX = (Screen.width * 0.9);

var quickSelectBackPlacementY = .01;

var quickSelectBackPlacementZ = (Screen.height * 0.9);

var quickSelectBackPlacement = Vector3(quickSelectBackPlacementX,quickSelectBackPlacementY,quickSelectBackPlacementZ);

var quickSelectBackCoord;

function Start()

{

 quickSelectBackCoord = camera.ScreenToWorldPoint(quickSelectBackPlacement);
 
 quickSelectBackCoord.y = quickSelectBackPlacement.y;
 
 var quickSelectBackPos = Vector3(quickSelectBackCoord.x,quickSelectBackCoord.y,quickSelectBackCoord.z);

 var quickSelectBack = GameObject.Instantiate(prefab, quickSelectBackPos, Quaternion.identity) as GameObject;

}

Does anyone have any ideas about how this effect might be achieved? All ideas are welcome.

Best Regards,

Steve