Custom inspector to look at the coordinate values (that should be getting serialized but aren't)

MyHexagonInspector.cs

using UnityEngine;
using System.Collections;
using UnityEditor;

[CustomEditor(typeof(MyHexagon))]
public class MyHexagonInspector : Editor 
{
	public override void OnInspectorGUI()
	{
		var myHex = (MyHexagon)target;
		base.OnInspectorGUI ();
		EditorGUILayout.LabelField("offsetCoord:", myHex.offsetCoord.PrettyPrint());
		EditorGUILayout.LabelField("cubeCoord:", myHex.cubeCoord.PrettyPrint());
		EditorUtility.SetDirty( target );
	}
}