The Big Screen Beyond 2 uses a Lighthouse tracking system made by Valve, the same motion tracking technology found in high-end VR headsets like the HTC Vive.

Lighthouse is not a camera pointed at you. Instead, it uses infrared light sweeping across the room from two or more base stations mounted on walls or shelves. Sensors on the Big Screen Beyond 2 itself detect these light sweeps and calculate the headset's exact position and rotation in 3D space. The system works in real time and does not require the headset to send video or data back to the base stations — the tracking happens entirely through light detection.

This matters because it means the Big Screen Beyond 2 can track your head position with high precision while you move around a room, which is essential if you are watching a virtual screen that needs to stay in the same spot in space. The Lighthouse system is also relatively affordable compared to other room-scale tracking methods, which is why Valve licensed it to other hardware makers.

Key Takeaways

  • Lighthouse uses infrared light sweeps from wall-mounted base stations, not cameras, to track the headset's position.
  • The tracking happens on the headset itself — it detects the light sweeps and calculates where it is, rather than sending data back to the base stations.
  • You need at least two base stations set up in your room for the system to work, and they must have a clear line of sight to the headset.
  • Lighthouse tracking allows the virtual screen to stay locked in place as you move your head, which is why it was chosen for a device designed to replace a physical monitor.

How Lighthouse Base Stations Work

Each Lighthouse base station contains a laser and a spinning mirror. The laser bounces off the mirror as it spins, creating a sweeping line of infrared light that covers the room. Two base stations sweep in slightly different patterns so the headset can figure out which station is which and where it is relative to both.

The base stations need to be plugged in and mounted where they have a clear view of the space where you will be using the headset. They do not need to be connected to your computer — they work independently once powered on. If the base stations cannot see the headset (because you are behind a wall or the light is blocked), tracking will drop out, which is why placement matters.

Why Lighthouse Instead of Other Tracking Methods

Other motion tracking systems exist. Some use cameras that watch the headset from the outside. Others use inside-out tracking, where cameras on the headset itself watch the room. Lighthouse was chosen for the Big Screen Beyond 2 because it offers low latency (almost no delay between your head movement and the screen updating), high accuracy, and does not require processing power on the headset itself.

Inside-out tracking, by contrast, uses the headset's own computing power to process camera images, which can drain battery and generate heat. Outside-in camera tracking requires a clear line of sight and can struggle in low light. Lighthouse works in any lighting condition and puts almost no load on the headset's processor, which matters for a device meant to run for hours.

Setting Up Lighthouse for the Big Screen Beyond 2

You will need two Lighthouse base stations, though three or four can improve coverage in larger rooms. Mount them at least 6 feet apart and at least 4 feet high, angled slightly downward toward the center of the space. They should be plugged into power but do not need to connect to your computer or network.

When you first put on the headset, it will scan for the base stations and establish tracking. If tracking feels jittery or drops out, check that the base stations have a clear line of sight to where you are standing and that they are not too close to reflective surfaces like mirrors or windows, which can confuse the light detection.

The Difference Between Lighthouse and Camera-Based Tracking

Camera-based tracking systems (used in devices like Meta Quest 3) watch the headset or the room with cameras and use computer vision to figure out where the headset is. This works well indoors and does not require separate hardware, but it can struggle in low light and uses more power.

Lighthouse does the opposite: it sends light to the headset, and the headset listens. This is more power-efficient and works in any lighting, but it requires the base stations to be set up beforehand. For a device like the Big Screen Beyond 2 that is meant to stay in one room and replace a monitor, Lighthouse is the better choice. For a portable headset you might use in different locations, inside-out camera tracking is more practical.

Tracking Accuracy and Latency

Lighthouse tracking is accurate to within a few millimeters and has latency of just a few milliseconds, which is fast enough that you will not notice any lag between moving your head and the virtual screen updating. This low latency is important for a device meant to display text and images — if there was noticeable delay, reading would feel uncomfortable.

The accuracy also means the virtual screen can stay locked in exactly the same spot in your room, even as you move around. If you stand up and walk to the other side of the room, the screen stays where you left it, which is the whole point of a virtual monitor.

Frequently Asked Questions

Do I need to connect the Lighthouse base stations to my computer?

No. The base stations only need power. They work independently and communicate with the headset through infrared light, not through any network or cable connection to your PC.

Can Lighthouse tracking work through walls or around corners?

No. The base stations need a clear line of sight to the headset. If you move behind a wall or obstruct the light path, tracking will drop out. This is why placement and room layout matter.

What happens if I only set up one Lighthouse base station?

The headset will not track properly. It needs at least two base stations to triangulate its position in 3D space. One base station alone cannot tell the headset how far away it is.

Does Lighthouse tracking work in bright sunlight?

Lighthouse uses infrared light, which is invisible to the human eye but can be overwhelmed by bright sunlight coming through windows. For best results, use the Big Screen Beyond 2 indoors or in shaded areas away from direct sunlight.

Is Lighthouse the same technology used in VR headsets?

Yes. Valve developed Lighthouse for the HTC Vive and licensed it to other manufacturers. The Big Screen Beyond 2 uses the same system, though adapted for a device that tracks head position rather than hand controllers.