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Question by lugduweb · Jan 09, 2015 at 01:24 PM · guistereoscopicrendertotexturestereoscopy

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;
 }
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Answer by Ericool · Jan 09, 2015 at 01:37 PM

Did you set the render texture as target texture to a camera. So the camera will copy its view into this texture?

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avatar image lugduweb · Jan 09, 2015 at 02:05 PM 0
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Thanks for answering. No I did not. I've just rendered the GUI in a texture and to a material (like above code), then used this material on a quad displayed on the front of the scene. This quad is then displayed into the 3d views.

So if I understand what you suggest, I shall try to render GUI on a Camera, then into a texture and then use this texture on the 3d obj ?

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