Correct scene dimension mismatch and bug with emtpy folder

navipy/sensors/bee_sampling.py

@@ -143,7 +143,8 @@ so that they are not rendered
             raise TypeError('filename must be a string')
         database_folder = os.path.dirname(database_filename)
         if not os.path.exists(database_folder):
-            os.makedirs(database_folder)
+            if database_folder:  # Check empty string
+                os.makedirs(database_folder)
         dataloger = DataBaseSave(database_filename,
                                  channels=['R', 'G', 'B', 'D'],
                                  arr_dtype=np.uint8)
@@ -162,6 +163,7 @@ so that they are not rendered
             # and the cmaxminrange has not already been assigned
             # so the image need to be rendered
             scene = self.renderer.scene(posorient)
+            scene = scene[..., 0]
             distance = scene[..., -1]
             distance[distance > self.world_dim] = self.world_dim
             scene[..., -1] = distance

navipy/sensors/renderer.py

@@ -322,5 +322,6 @@ is the distance.
         :rtype: a double numpy array
         """
         self.update(posorient)
-        return np.concatenate((self.image,
-                               self.distance), axis=2)
+        toreturn = np.concatenate((self.image,
+                                   self.distance), axis=2)
+        return toreturn[..., np.newaxis]