I am creating a wheel physics material. From this post I gather that this feature specifies the “sideways friction.” But I am somewhat confused as x, y and z value can be changed between 0 … n If the wheel is only 1 unity wide, do 1 enter in 1 for the x value of Friction Direction 2?
You’re on the right track after reading that post you linked to.
FrictionDirection2 is a Vector3 specifying the direction of that “sideways friction.” That is, you’re telling Unity which direction is “sideways.” You can set the value to some direction and (I assume) Unity will internally normalize the vector to a unit vector. So if you set FrictionDirection2.X to 1.0 or 9999.0 it won’t make a difference as long as your Y and Z are scaled accordingly.
DynamicFriction2 and StaticFriction2 specify the magnitude of the friction.