Generating Texture2D with custom color array at runtime seems to be not working correctly

I try to write some code for exporting terraindata as an highmap. that is all okay but wehn i put my generated color array in a code created texture2D the result is this:

https://i.imgur.com/tJXuvjM.png
(the big one is the correct generated color array. the smaler ones the finished texture)

its seems to be that the pixels will be only set in the first 2 rows. maybe some wrong format or something?

here is my code:
(sorry for the mess <.<)

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using System.IO;
4. using UnityEngine;
5. using UnityEngine.UI;
6.  
7. public class TerrainComponentExporter : MonoBehaviour
8. {
9.  
10.     public GameObject template;
11.     public GameObject meshdebug;
12.     public SpriteRenderer spritedebug;
13.     public Image imageDebug;
14.  
15.     public TextureFormat format;
16.     public bool mipChain;
17.     public bool isLinear;
18.  
19.  
20.     void Start()
21.     {
22.         Terrain t = Terrain.activeTerrain;
23.         int size = (int)t.terrainData.size.x;
24.  
25.         Texture2D tex = new Texture2D(size, size, format,mipChain ,isLinear);
26.    
27.         //Color32[] colors = tex.GetPixels32();
28.         Color32[] colors = new Color32[(size*size)];
29.  
30. // generate colors for the "highmap"
31.         for (int i = 0; i < size; i++)
32.         {
33.             for (int ii = 0; ii < size; ii++)
34.             {
35.                 Vector3 testPos = new Vector3(0.5f + i, 0, 0.5f + ii);
36.                 byte height = (byte)Mathf.Clamp(Mathf.Round(t.SampleHeight(testPos)), 0, 255);
37.                 colors[(i + ii)] = new Color32(height, height, height, 255);
38.             }
39.         }
40.         GenerateDebugWorldPixels(colors,size,size,new Vector3(0,-10,0));
41.         tex.SetPixels32(colors);
42.         tex.Apply();
43.         //GenerateDebugWorldPixels(tex.GetPixels32(),size,size, new Vector3(0, -10, 0));
44.  
45.         meshdebug.GetComponent<MeshRenderer>().material.mainTexture = tex;
46.  
47.         Sprite sp = Sprite.Create(tex, new Rect(0, 0, size, size), new Vector2(), 16f);
48.         spritedebug.sprite = sp;
49.         imageDebug.sprite = sp;
50.        
51.         // byte[] bytes = tex.EncodeToPNG();
52.         // File.WriteAllBytes(Application.dataPath + "/heightmap.png", bytes);
53.  
54.  
55.  
56.     }
57.  
58.  
59.     void GenerateDebugWorldPixels(Color32[] colors, int sizeX, int sizeY, Vector3 worldPos)
60.     {
61.         for (int i = 0; i < sizeX; i++)
62.         {
63.             for (int ii = 0; ii < sizeY; ii++)
64.             {
65.                 GameObject go = Instantiate(template, new Vector3(worldPos.x+i, worldPos.y, worldPos.z+ii), Quaternion.Euler(90, 0, 0));
66.                 go.name = (i + "," + ii);
67.                 go.GetComponent<SpriteRenderer>().color = colors[(i + ii)];
68.  
69.             }
70.         }
71.     }
72.  
73. }
74.  

 

Havent understood all your code but this looks odd:
colors[(i + ii)]
Usually the 2d index mapped to a 1d one is (in your notation):
i*size + ii
Just try it for a small array and Debug.Log the position you write to.

 

Thanks bro... i didnt see that xD, fixes my problem and now he writes all colors correctly in the array, so the export is no problem anymore