diff --git a/environments/factory/base/base_factory.py b/environments/factory/base/base_factory.py
index f2dabed..f00e049 100644
--- a/environments/factory/base/base_factory.py
+++ b/environments/factory/base/base_factory.py
@@ -97,7 +97,10 @@ class BaseFactory(gym.Env):
             rewards_base = RewardsBase(**rewards_base)
 
         assert obs_prop.frames_to_stack != 1 and \
-               obs_prop.frames_to_stack >= 0, "'frames_to_stack' cannot be negative or 1."
+               obs_prop.frames_to_stack >= 0, \
+               "'frames_to_stack' cannot be negative or 1."
+        assert doors_have_area or not obs_prop.indicate_door_area, \
+            '"indicate_door_area" can only active, when "doors_have_area"'
         if kwargs:
             print(f'Following kwargs were passed, but ignored: {kwargs}')
 
diff --git a/environments/factory/factory_dirt.py b/environments/factory/factory_dirt.py
index 2e51983..bdf1834 100644
--- a/environments/factory/factory_dirt.py
+++ b/environments/factory/factory_dirt.py
@@ -286,7 +286,7 @@ if __name__ == '__main__':
 
     obs_props = ObservationProperties(render_agents=aro.COMBINED, omit_agent_self=True,
                                       pomdp_r=2, additional_agent_placeholder=None, cast_shadows=True,
-                                      indicate_door_area=True)
+                                      indicate_door_area=False)
 
     move_props = {'allow_square_movement': True,
                   'allow_diagonal_movement': False,
@@ -297,7 +297,7 @@ if __name__ == '__main__':
 
         factory = DirtFactory(n_agents=10, done_at_collision=False,
                               level_name='rooms', max_steps=1000,
-                              doors_have_area=True,
+                              doors_have_area=False,
                               obs_prop=obs_props, parse_doors=True,
                               verbose=True,
                               mv_prop=move_props, dirt_prop=dirt_props,