Serialized Object Loses Data On Entering Play Mode

Hey everyone,
i'm altering my terrain with a script. These changes are permanent (they stay if I exit play mode). So I created a simple scriptable object that saves a two dimensional float array durring editor mode. Also i wrote a save and load function in an editor script. As long i stay in editor mode, i can save and load the current float array. But as soon as i enter playmode the array is gone.

Scriptable Object:

Code (CSharp):

1. public class HeightMapScriptable : ScriptableObject
2. {
3.     public TerrainData terrainData;
4.     private float[,] heightMapFloats;
5.  
6.  
7.     public void SaveHeightMap()
8.     {
9.         float[,] temp = terrainData.GetHeights(0,0,terrainData.heightmapResolution,terrainData.heightmapResolution);
10.         heightMapFloats = new float[temp.GetLength(0), temp.GetLength(1)];
11.         for (int i = 0; i < temp.GetLength(0); i++)
12.         {
13.             for (int j = 0; j < temp.GetLength(1); j++)
14.             {
15.                 heightMapFloats[i,j] = temp[i,j];
16.             }
17.         }
18.         EditorUtility.SetDirty(this);
19.     }
20.     public void LoadHeightMap()
21.     {    
22.         terrainData.SetHeights(0,0,heightMapFloats);
23.     }
24. }

Editor Script:

Code (CSharp):

1. [CustomEditor(typeof(HeightMapScriptable))]
2. public class HeightMapEditor : Editor
3. {
4.     public override void OnInspectorGUI()
5.     {
6.         HeightMapScriptable heightMap = (HeightMapScriptable)target;
7.         if(GUILayout.Button("Save"))
8.         {
9.             heightMap.SaveHeightMap();
10.             EditorUtility.SetDirty(heightMap);
11.         }
12.         if(GUILayout.Button("Load"))
13.         {
14.             heightMap.LoadHeightMap();
15.         }
16.         base.OnInspectorGUI();
17.     }
18. }

I hope you can explain me what is happening.
Greetings Pasko

 

Unity cannot serialize multidimensional arrays.

 

Ah ok thank you.
For anyone reading this looking for a solution. I saved my 32 bit as rgba in all channels as 8 bit decoded, because i couldnt get the RFloat format to work. Actually in unity i use RFloat but saving it exr didnt work for me. As 4 channel png did just work fine.