Voussoir dimension: Neutrino Detector access and climbing mechanics

Prerequisites for Accessing Voussoir

The Voussoir dimension is entered through a portal inside the Neutrino Detector. Before attempting to reach this location, prepare the following:

• Diving Suit: Equip this for the documented underwater tunnel approach. It extends underwater time, increases swim speed and improves visibility, but you must still surface for air. Hydroplant also documents a Jetpack approach to the isolated tower; that is a separate route and does not make the swim itself safe without a suit.
• Navigation markers: The underwater route through the Hydroplant can be disorienting. Prepare landmarks or place markers to track your path.
• Respawn setup materials: If you plan to stay, bring a Makeshift Bed and the supplies to place it in a defensible outpost. A crate alone does not set a respawn point; sleeping in a Makeshift Bed moves your bed respawn point.
• Inventory space: Reserve capacity for Neutrino Mappers, which the current item page places in several Voussoir locations, and for any other identified loot. Digital Gold is crafted rather than picked up in Voussoir, while the listed Transcendium Rock locations are elsewhere. Filling inventory before learning the return route creates unnecessary risk.

Locating the Neutrino Detector

The Neutrino Detector sits as a standalone building in the eastern Hydroplant reservoir. The documented swimming route uses one of two underwater tunnels; the entrance is set back from the tower in a crevice with glowing Reservoir Growth. A Jetpack can reach the tower by a separate approach, so swimming is the route covered here rather than the only possible access. Once you reach the outer deck, a placed Plant Rope can make later surface-water returns easier, as described in the independent Hydroplant walkthrough.

Swim Route Workflow

1. Enter the Hydroplant from a known access point. Identify the northeastern section of the facility before submerging.
2. Navigate the flooded tunnels using your chosen markers. The underwater passages branch in multiple directions; maintain awareness of which tunnel leads toward the open water where the Neutrino Detector sits.
3. Follow the lit pipes and vents into the Neutrino Detector chamber, then surface inside it. Do not assume the tunnel exits in open water beside the tower.
4. Climb from the chamber to locate the portal and transition into Voussoir. If you are using the tunnel, surface when a safe air pocket is available; the Diving Suit extends the time underwater but does not remove the air limit.

Recovery advice: If you become disoriented underwater, return to the last known landmark and reorient. Swimming in circles wastes oxygen and increases drowning risk. If oxygen runs low before reaching the detector, retreat to the previous safe area and try again with better route preparation.

Understanding Voussoir's Climbing Mechanics

Voussoir is a vertical dimension where climbing mechanics form the core gameplay. Unlike horizontal exploration zones, this portal world tests movement skill and route planning. The dimension features:

• Vertical traversal: Most objectives require ascending or descending significant heights. Assume vertical distance is the primary challenge.
• Neutrino Mappers: These are the headline collectibles within Voussoir. They serve as the primary reason for extended exploration.
• Player-built recovery anchors: A December 2024 Steam discussion mentions two places players used for outpost bases in Voussoir. Treat that as a dated community observation, not a guarantee of two fixed game save points. Choose a defensible location yourself, place a suitable bed, and verify your respawn setting before relying on it.
• Collectible route: The current Neutrino Mapper item page identifies pickups in the first building, an Order camp with a tower and parked truck, and the ski lift building. These named locations are better objectives than an unsourced general claim about Digital Gold or Transcendium lying in this world.

The Voussoir source also recommends cold protection: a total of +3 cold resistance fully counters the ordinary hypothermic condition. Check the equipment you actually have before trading the Diving Suit for a combat and cold loadout. A portable heat source or temporary buff can change the requirement, so +3 is a planning benchmark rather than a portal-entry lock.

Climb Safety Decision Table

Route planning strategy

Treat the first visit as reconnaissance rather than a full clear. This two-pass approach prevents the common mistake of attempting to loot, map, climb, and build simultaneously.

First Visit: Reconnaissance

• Find the portal entry and learn the immediate climb area.
• Identify where you would build an outpost.
• Identify a defensible location where a placed bed and storage would support a return visit; do not assume an unbuilt outpost is an automatic checkpoint.
• Leave before inventory fills.

Second Visit: Collection

• Establish an outpost at the chosen location and deliberately set the bed respawn point if that is the intended recovery plan.
• Branch out for the documented Neutrino Mapper pickups and other resources you can identify in the current area.
• Return to the outpost to bank loot before attempting further climbs.
• Use the established return path to exit safely.

Mini-Outpost Guidelines

A functional outpost inside Voussoir does not require a full base setup. Focus on:

• One placed Makeshift Bed whose respawn behavior you have checked
• One small storage container
• Food and water backup
• Clear visual indicator of the return direction

Place rare finds into the container before attempting the next climb. If the subsequent branch goes badly, the most valuable portion of the run remains protected near the route anchor.

Recovery and Failure Prevention

Voussoir punishes forward-only thinking. A climb that appears straightforward on the way up can become confusing when returning with a full inventory. Apply these recovery principles:

• Before each risky climb, verify you know the way back down. If uncertain, mark the platform or return path first.
• Use a verified outpost as a route anchor, not an assumed automatic save spot. Place a suitable bed before branching far from the portal path, and confirm the recovery route from that location. This breaks the expedition into shorter climbing loops rather than one fragile push.
• Do not carry every climbing reward through every new branch. Bank documented Neutrino Mappers and any confirmed loot from this visit first, then explore with a lighter bag.

Common Failure Points

• Attempting the Hydroplant swim without a Diving Suit leads to drowning before reaching the detector.
• Getting disoriented in flooded tunnels causes wasted oxygen and failed approaches.
• Forgetting bed materials means a planned respawn outpost cannot be built on that trip; a storage crate alone will not set your respawn point.
• Treating the first visit as a full clear instead of a route-learning run increases the chance of losing valuable loot.
• Filling inventory before learning the climb back to the exit creates unnecessary extraction risk.

Priority for Extraction

When inventory space is limited, prioritize items that unlock other decisions:

1. Neutrino Mappers: The headline collectible and primary reason for exploration.
2. A confirmed current objective: Choose the next pickup from the Voussoir location list only after checking its actual position and use.
3. Other verified salvage: The Voussoir page lists resource nodes such as Hydro Pipes, Mine Crates, and equipment. Collect a specific material only when the next craft needs it.
4. Lower-priority bulk materials: Leave these for a later visit after the route back to the portal is established. Portal-world natural resources can renew under the documented reset rules.

This priority order ensures that each successful extraction returns the most valuable items first, while renewable resources can be collected on later runs with less risk.

Common Mistakes

Related route pages before the climb

If the bottleneck is still the Hydroplant side rather than the climb itself, use the dedicated Neutrino Detector access route first. If the problem is staging and recovery around Hydroplant rather than the portal entry, the Hydroplant outpost guide is the better companion page.