ml-agents/UnitySDK/Assets/ML-Agents/Examples/Walker/Scripts/WalkerAcademy.cs

using UnityEngine;
using MLAgents;

public class WalkerAcademy : Academy
{
    public override void InitializeAcademy()
    {
        Monitor.verticalOffset = 1f;

        // We increase the Physics solver iterations in order to
        // make walker joint calculations more accurate.
        Physics.defaultSolverIterations = 12;
        Physics.defaultSolverVelocityIterations = 12;
        Time.fixedDeltaTime = 0.01333f; //(75fps). default is .2 (60fps)
        Time.maximumDeltaTime = .15f; // Default is .33

        FloatProperties.RegisterCallback("gravity", f => { Physics.gravity = new Vector3(0, -f, 0); });

    }

    public override void AcademyStep()
    {
    }
}