Rendering OnGUI elements on 3d object / Unity Free / Stereo Cameras

Hello, I'm using 2 cameras for stereo purpose (one for left eye, one from right eye). Everything works fine, but at the moment I did not find a good way to have GUI rendered correctly so I can see it on both eyes.

The GUI seems to be rendered after the two cameras so I've tried to render it into a texture and map it onto a 3d object. I don't know if it's a Unity Free limitation or that I did something wrong but it does not work as expected.

Any help would be appreciated ! Thanks a lot in advance !

So here is a quick summary of what I did at the moment (which works fine if I do it with a camera instead of the object with the GUI script) :

• created a GameObject for GUI management an assigned the GUI script thereafter

• created a material in project and assigned it to the "guiToMaterial" by drag/drop

• created a quad in front of the camera and drag/dropped the same material

GUI script extract:

 public Material guiToMaterial = null; // <= assigned from Unity UI
 private RenderTexture renderedTexture = null;
 
 void Awake()
 {
     renderedTexture = new RenderTexture(Screen.width, Screen.height, 0);
     guiToMaterial.mainTexture = renderedTexture;
 
 }
 
 private void OnGUI()
 {
    RenderTexture.active = renderedTexture;
 
    //GUI.Button...
 
    RenderTexture.active = null;
 }