Tenebris Somnia: Items, Keys & Collectible Locations

Use the item you already hold to find its next interaction. This is a progression and collectible reference, not a list of every healing or ammunition pickup. Names remain in English to match the inventory. The same floor number can describe different buildings; the tables name the room or building whenever that matters.

Apartment tools and weapons

Item	Location / pickup	Use
Apartment Key	Starting inventory; later purified in Desiderium water	Apartment access and the late return route
Wrench	Floor 3 apartment bathroom, behind the shower curtain	Window boards and melee combat
Glass + Developing Chemical	Bedroom bedside table + apartment kitchen	Combine mirror blood and chemical; expose the mixture at the opened bedroom window
Auritsatio	Opening mixture after sunlight exposure	Use at the sealed study door; later Auritsatio is a separate late-game recipe
Old Book	Opening apartment; new pages become readable as the story advances	Records clues; read every page for De Relictis
Revolver	Floor 2 computer room, box beside the photograph	Ranged weapon; keep unused on a Wrench Queen branch
Screwdriver → Iron Pipe	Screwdriver on projector-stair boxes; Pipe on the bar bathroom wall	Remove the screw to collect the optional weapon
Shotgun	Ground-floor cinematography class, near the filmed figure and camera	Ranged weapon; collect before harder fights if not doing a restricted run

Film, keys and darkroom materials

Item	Location / pickup	Use
USB Cable + Adapter	Cable from the bar sound puzzle; adapter by the projector stair route	Combine into a phone charger; use its recorded lock clue
DEVORA film canisters	Office chest; childhood area below Floor 0; cursed Film School room	Screen each canister to unlock its theater box
Cow Skull	Theater reward after the second canister	Hooked door on the route to Fumus
Red Pentacle Stone	After Fumus	Marked bathroom door in Ivan's Floor 3 apartment
Silver Key → Silver Bottle	Exhaust Sanguis's Spell dialogue after the cursed film; use key on Floor 2 bathroom cabinet	Bottle takes water from three save points before moonlight purification
Cold Chisel	Final theater box after the purified canister	Place in the upper boarded door, then strike it
White Light Bulb → Red Lightbulb	White bulb from the Film School darkroom; use it at the upper bloody table	Red safety light for photo development
Chemicals	Table behind the Floor 3 red Pentacle Stone door	Prepare the developing trays
Photo Roll + Photo Paper	Roll outside the theater; paper in Film School screenwriting	Negative → Printed Photo → Photo at darkroom stations
Photo → Hexagonal Stone	Place developed Photo in Ivan's bedroom frame; inspect drawer	Unlock the upper Film School door

Desiderium transformations

Show late-game inventory spoilers

Item	Location / pickup	Use
Black Bulb + Blue/Yellow RCA Cable	Altered Film School TV route and darkroom	Invert colors with the bulb; connect the now-yellow cable to recover belongings
Lead Fly	Theater after completing the two fly-statue rooms	Door bearing the matching fly symbol
Tin Key → Green Candle	Statue-defense route; key opens the theater chest	Escape the inverted door and clear the upper stair seal with the candle
Photographs + Glass Box	Floor 2 altered study clothes rack + bedroom bedside table	Poem puzzle and Memento container
Glass Vase → Circular Plate	Floor 3 study; blood/film mixture heated in the accessible oven	Plate opens the chest for VHS Tape
Julia's Figurine + Ivan's Figurine	Poem-puzzle progression + VHS/TV encounter	Combine both with Glass Box to make Memento
Memento	Both figurines combined with Glass Box	Use at the production-studio statue's red chest opening
Lapis Fictus Knife → Melanosis → Viridis → Aurifer	Ivan statue after late Auritsatio; electricity, mercury, then hotel moonlight	Final weapon chain; preserve a save before any Relicta kill

For full sequences, use red bulb and photo development, moonlight and knife transformations and the walkthrough. An item name alone is not a complete recipe.

All six Copper Stars

Star	Apartment floor	Where to search
1	3	Street through blue door; search the trash can
2	1	Through apartment door A and the double glass doors; look on the floor
3	0	Plant near the elevator
4	0	Dark TV room after the Copper Seed route; inspect the right shelf
5	1	Drawers in the room beyond the Cow Skull door, after Fumus
6	1	Return to the red figure at the top of the dining-room stairs after obtaining Cold Chisel

All six star lockers

Stars are spending items for the marked lockers; the numbers below are checklist labels, not mandatory matched pairs. Finish all six before the developed-photo story transition. If a room is temporarily blocked, return before that cutoff rather than assuming the locker is permanently lost.

Locker	Apartment floor	Location	Contents
1	2	Director's room, right trophy cabinet	Aqua Vitae
2	2	Ivan's kitchen, upper-right cabinet	Lavendoleum
3	1	Door B bathroom with save point, right cabinet	Revolver ammo
4	1	Projector-room upper shelf to the right, via door A	Lavendoleum
5	3	Green-symbol apartment room, left closet	Shotgun shells
6	0	Through glass door and emergency exit, up one stair flight and through the door	Revolver ammo

Missing item or missing interaction?

Check the item's state: a white bulb is not the red bulb, Printed Photo is not Photo, and the Viridis Knife is not yet Aurifer. Move close to the object before using the inventory. For a locked symbol door, compare the shape as well as the color. If the inventory disappeared during the ritual, follow the Desiderium recovery route rather than searching the earlier pickup rooms.

Sources

• Publisher-pinned puzzle guide: pickups and transformations.
• Star Lockers: six stars, six containers and cutoff.
• Into Indie Games: Film School and Shotgun, photo materials and late inventory.

Checked October 23, 2026. Collectible numbering is an editorial checklist; no fixed randomized code or exhaustive consumable claim is implied.