Open the symbol door with the Triangular stone, then retrieve the AS key from under the door to enter AS Films. On the Tenebris Somnia second floor you get through the television door, follow Sanguis's window route, and burn the poster inside the production company. If you are still getting out of Ivan's rooms, finish the Ivan's apartment walkthrough first.
How do you open the television puzzle door?
Install both batteries in the remote control, press its single button, then solve the television puzzle to open the door.
- Collect the battery in the apartment and the other battery in the kitchen.
- Return to the remote attached to the table and install both batteries. It stays attached, so operate it there.

- Press the remote's only button, then return to the television. Follow the TV puzzle solution for the symbol sequence. Completing it opens the door onward.

While searching the apartment, pick up the glove among the short film costumes. The electrical panel is dangerous to touch barehanded, so keep that hazard in mind as you explore.

Why can't you hit the invisible creature or light the red candle?
The creature can only be attacked in darkness, and the lighter cannot light the red candle.
Sanguis tells you to cross the window beside him. He also warns that the creature beyond it is invisible in the light and visible in the dark. Once across, darken the area by closing the blind before trying to fight it; attacking while the room is lit will get you nowhere.

The blind has a hole for a crowbar. If you cannot close it, that fitting is your next clue.
The lighter's flame will not ignite these candles. Repeatedly trying it on the red candle will not solve the darkness problem; follow Sanguis's instruction about the blind.
How do you open the Triangular stone symbol doors?
Bring the Triangular stone close to a door with its matching engraved symbol: the symbol disappears, and the door opens without consuming the stone on its first use.
- After speaking to Sanguis, cross the window and collect the Triangular stone in the candle-filled area near the red figures.

- Return to the second-floor hall and approach the matching symbol door with the stone. At the blue door beside the elevator, Julia remarks that the symbol disappeared when she brought the stone close.

- Go through the unlocked door. You still have the stone after this interaction, so opening this entrance does not cost you the item.
How do you get the AS Films key under the door?
Put something beneath the locked door to catch the key, then push the key out of the opposite lock with something pointy and retrieve the AS key from underneath.
- Inspect the locked door. Julia can see through the keyhole that someone left the key in the lock on the other side.

- Place the catching item under the door first. You need it in position before knocking the key loose.
- Push through the keyhole with a pointed item, then retrieve the fallen key from under the door.
- Use the AS key to unlock the door and enter AS Films.

The stone gets you through the engraved-symbol entrance, but this locked door needs the AS key. Once inside, your next obstacle is the incomplete poster.
How do you solve the Débora burning poster puzzle?
Assemble the Débora poster, rotating its pieces as needed, then burn the finished poster and take the Bathroom key from the remains.
- Search AS Films for poster pieces. Inspect the promotional figure carrying an extra piece of cardboard.

- Bring the pieces to the incomplete poster frame. Its large empty center is where you rebuild the picture.

- Select, rotate, and place the pieces. Match the white shirt and bow tie at the top, the plate and eye in the middle, and the flames along the bottom. Rotate a piece when its picture fits the area but its orientation does not.

- Inspect the completed picture. Julia recognizes the Débora poster, but the flames were never part of its original design. That change is your cue to burn it.

- Burn the poster and collect the Bathroom key from the burnt remains.

You have entered AS Films and recovered the Bathroom key. Use it for the bathroom, then continue with the first floor walkthrough for the next part of the building route.