title: How can I draw GUI on a texture in Unity 3D
body: <p>How can I draw GUI on a texture?
  The idea is to use "render texture" of Unity Pro to which I would render the GUI and then I would apply it on a quad somewhere in space.</p>
  
  <p>My problem is, that I do not know how to render GUI into the texture, since GUI is rendered on top of everything, not only in the camera.</p>
  
  <p>Thanks!</p>