3D.ru

    static Texture2D CreateNormalTexture(Terrain terrain) {
                var heightResolution = terrain.terrainData.heightmapResolution;
        var onePerWidth = 1f / (heightResolution - 1);

        var colors = new Color[heightResolution * heightResolution];
        for (int i = 0, num = 0; i < heightResolution; i++) {
            for (var j = 0; j < heightResolution; j++, num++) {
                var n = terrain.terrainData.GetInterpolatedNormal(i * onePerWidth, j * onePerWidth);
                colors[num] = new Color((n.x + 1f) * 0.5f, (n.y + 1f) * 0.5f, (n.z + 1f) * 0.5f);
            }
        }

        var texture = new Texture2D(heightResolution, heightResolution, TextureFormat.RGB24, false);
        texture.SetPixels(colors);
        texture.Apply();

        return texture;
    }
 

public Terrain terrain;

[ContextMenu("CreateNT")]
void CreateNT () {
SaveTexture(CreateNormalTexture(terrain), "/Data/Terrains/TerrainNormals", "TerrainNormalTest");
}


    static Texture2D CreateNormalTexture(Terrain terrain) {
        var heightResolution = terrain.terrainData.heightmapResolution;
        var onePerWidth = 1f / (heightResolution - 1);

        var colors = new Color[heightResolution * heightResolution];
        for (int i = 0, num = 0; i < heightResolution; i++) {
            for (var j = 0; j < heightResolution; j++, num++) {
                var n = terrain.terrainData.GetInterpolatedNormal(i * onePerWidth, j * onePerWidth);
                colors[num] = new Color((n.x + 1f) * 0.5f, (n.z + 1f) * 0.5f, (n.y + 1f) * 0.5f);
            }
        }

        var texture = new Texture2D(heightResolution, heightResolution, TextureFormat.RGB24, false);
        texture.SetPixels(colors);
        texture.Apply();

        return texture;
    }

 static void SaveTexture(Texture2D texture, string _path, string _name){
         byte[] bytes = texture.EncodeToPNG();
         var dirPath = Application.dataPath + _path;
         if (!System.IO.Directory.Exists(dirPath))
         {
             System.IO.Directory.CreateDirectory(dirPath);
         }
         System.IO.File.WriteAllBytes(dirPath + "/" + _name + ".png", bytes);
         Debug.Log(bytes.Length / 1024 + "Kb was saved as: " + dirPath);
 #if UNITY_EDITOR
         UnityEditor.AssetDatabase.Refresh();
 #endif
}