Only when using the 3d GUI. I have tried changing the depth on the camera's. If I make the NGUI 3D camera a lower depth and the Oculus camera's higher I see what I'm suppose to, but with no GUI's obviously. If I change the order to have the 3D GUI higher then Oculus camera's I see my GUI text, but with a black background. The only way I've been able to make it work is by using the above link to render to a texture and then apply it to a plane. Which works, but I think it looks like crap when it comes to text readability. However 2D GUI's work just fine from NGUI. If I use an NGUI 2D setup and change it from orthographic to perspective I get the same results. I have clear flags "Depth Only" set as well still.