Mostly, it’s a matter of adjusting your threshold values (I can’t read them, the gif is too small), and adjusting the speeds in the NavMeshAgent. I’m not at my gaming computer at the moment, but I believe there is a setting for accelleration, which lets you ramp up how fast the character goes from 0 to 60, so to speak. If this is too fast, you’ll get jitter.
Rick should have some pointers to get the correct threshold settings for Walk and Run.
