So I've read through all the Smooth MouseLook threads here and at Unity answers and have to say that none of the solutions (using FixedUpdate and/or using frames averaging) give a really smooth mouse such as a shooter like QuakeLive.
Try this test, circle strafe around an object (so basically walk sideways around a cube, while continuously looking at it). You will see a jitter in the edges of the cube.
But the problem seems to be in the CharacterController because here's how you can get very smooth movement: In the Inspector, set the CharacterMotor Script to NOT use fixedUpdate, ahh, beatiful now, so smooth...I thought that would be the solution, now both the CharacterController and MouseLook use Update. But a new problem arrived, if I shoot a rigidbody projectile and walk at the same time, the projectiles are now jittery.
So, has anybody every gotten a really smooth movement out of Unity for an FPS or does anybody know why the projectiles are jittery when not using FixedUpdate?
Any hints are greatly appreciated!