Rendering a camera view on top of the GUI

Hello,

Is it possible to render a view window on top of the GUI. No matter what I do, the GUI items always appear on top of any view I render (in my project, there are multiple cameras rendered on the screen).

Further explanation:

I have two cameras and I render their views at the same time. I re-size the 2nd cameras view port rectangle and try to render it on top of the GUI i have. Think of it as the map window on the corner of the screen in RPG games… So this second window is always stays hidden behind the HUD. How do I succeed to render this view on top of my HUD, so that it wont be obstructed ?

Thanks

Here is the answer I found: