Solution to low resolution of real racing 3 in Nexus 7 (2013)

I accidentally ran into this solution.

1. Install "ultimate rotation control" and lock your screen at auto.
2. Close the game.

3. Turn the device into portrait mode. That is, turn the device verticality.
4. Start the game. The game should be stuck at its first screen.
5. Turn the device into landscape mode. (horizontally)
6. Enjoy the high resolution version of RR3!

Update 12/29/2013:
won't work for the newest version