Moving camera perspective sideways when tilting device

I'm trying to get the "hologram" effect by moving the cameras perspective when tilting the device.

The effect can be seen in iPhone games like Illusion labs Labyrinth game (where you roll a ball using tilt). It can also be seen in games like HoloToy and MachDice.

I got the tilting code all sorted out but now i'm trying to find the correct way of shifting the perspective sideways. So if I have a cube in the middle of the screen I should be able to see the sides or top/bottom by tilting the device.

First I tried moving the camera sideways but that didn't look right. After that I tried rotating the cube instead which looks kinda good but still not as good as in the other mentioned games. When rotating the cube you don't really get the feeling of moving the perspective. I would kind of like to get the same effect as when moving the camera sideways but still having the objects remain in their original location and not moving left or right, just the perspective part of it.

Is there some way to shift the perspective of the camera without moving or rotating it? Like skewing the perspective or something? Or how could I solve this?

Thanks!

 

Hey was wondering if you got this to work?