I’m new to Unity and I have been hardstucked for a couple of days trying to figure out what I’m doing wrong.

My purpose is to take a screenshot of a “minimap” (actually is turretCamera in the code) that is in the top right corner of the screen. It is 768 pixels width and 432 pixels height.

I leave below my script, any help is appreciated:

void Start()
{
  // Configurar el modelo y el trabajador
  Model model = ModelLoader.Load(modelAsset);
  worker = WorkerFactory.CreateWorker(WorkerFactory.Type.ComputePrecompiled, model);

  // Configurar la render texture  
  cameraTopLeftCorner = turretCamera.ViewportToScreenPoint(new Vector3(0, 0, turretCamera.nearClipPlane));
  cameraBottomRightCorner = turretCamera.ViewportToScreenPoint(new Vector3(1, 1, turretCamera.nearClipPlane));

  targetTextureWidth = cameraBottomRightCorner.x - cameraTopLeftCorner.x;
  targetTextureHeight = cameraBottomRightCorner.y - cameraTopLeftCorner.y;

  renderTexture = new RenderTexture(Mathf.CeilToInt(targetTextureWidth),   Mathf.CeilToInt(targetTextureHeight), 24);

  tmpRenderTexture = turretCamera.targetTexture;
  turretCamera.targetTexture = renderTexture;
  // cameraa.targetTexture = null;
}
private void OnGUI()
{
  // ************Screenshot camera************
  Texture2D texture2D = new Texture2D(renderTexture.width, renderTexture.height, TextureFormat.RGB24,     false);

  RenderTexture.active = renderTexture;
  Rect RoI = new Rect(cameraTopLeftCorner.x, cameraTopLeftCorner.y, targetTextureWidth,     targetTextureHeight);

  Debug.Log("ROI");
  Debug.Log(RoI.xMin +", " + RoI.yMin);
  Debug.Log(RoI.xMax + ", " + RoI.yMax);

  texture2D.ReadPixels(RoI, 0, 0);
  texture2D.Apply();
// ************Screenshot camera************
// rest of code...