so I implemented the observation room as an instance from the PTE instances folder when I created the basic structure and lighting of another level of mine. I placed a tree in front of it then, because it throws/casts a pretty looking shadow. After I completed it (I've added more lights, switched textures, added prop_statics and prop_dynamics,...) the pretty shadow was completely gone, because it doesn't emit and light anymore. I tried to re-implement the observation room again and changed the lighting when running it, but it still doesn't work. Does anyone know why this happens to me in the completed .vmf, but not in the basic, empty .vmf?

Regards,
iSpectra

There is a logic_relay called "@relay_lights_on" into the PTI observation_room that needs to be fired for the env_projectedtexture to Turn on... You can add a trigger_multiple for example at the entry of that room so the player touch it when he enters, with the following output:

- OnTrigger > @relay_lights_on > Trigger