Hi there,
Sorry to bump - just wondering if anybody has any answers for me? 
Thanks!
Matt
EDIT: I would like to add more detail to my request to better assist anyone willing to help me.
I am trying to create a control that makes the player direction rotate 90 degrees instantly, however, I want the character model and the camera (third person) to change direction smoothly.
The mechanics I have in mind of the game are as such so that the character can only rotate every 90 degrees (mouse look is disabled). Ideally, the player will be running while making these turns.
I hope this helps!