Quick Answer
Keep beams on-plane with spheres, change planes with pyramids, then align the sliding laser receiver. Send the beam through the blue number-one marker, up through number two, and back to your partner; slide and rotate the movable relay to catch that return beam at the lower node. The We Were Here Tomorrow Exotic Matter Laboratory laser relay shares one connected beam chain, so keep its upstream crystals in place.
The Exotic Matter Laboratory numbered laser markers, Exotic Matter Laboratory spheres and pyramids, and Exotic Matter Laboratory sliding laser receiver are different descriptions of this same relay puzzle. It takes place in the Exotic Matter Laboratory chapter; start with the laser switched on and a crystal in its path so the beam reaches the upper floor.
The laboratory setup connects lasers through crystals, carrying the beam between floors.
Shown at 150:01 in Tango Tek2’s video.How do the Exotic Matter Laboratory spheres and pyramids redirect the laser?
Spheres keep the beam on the same plane, while pyramids change its plane and turn it through a right angle.
| Crystal | Beam behavior |
|---|---|
| Sphere | Same-plane redirection |
| Pyramid | Plane change, right-angle turn |
Choose the crystal for the next direction
Look at where the next receiving point sits relative to the incoming beam. Keep a sphere for a turn on the same plane; switch to a pyramid when the route needs a plane change, such as sending the beam between floors.
Adjust the socket that can rotate
Place the sphere in its relay socket, then adjust the dial to turn the outgoing beam toward the next point. Some sockets cannot swivel, so change the crystal when the required direction calls for it.
A spherical crystal sits in the relay socket for the next beam connection.
Shown at 152:30 in Tango Tek2’s video.Keep the upstream chain intact while you work downstream. Removing a crystal from that same chain cuts the beam feeding your partner; put it back to restore the connection.
How do you connect the Exotic Matter Laboratory numbered laser markers?
Pass the beam through the blue number-one marker, send it upstairs through number two, then direct it back toward your partner.
The beam passes through the blue number-one marker and continues upstairs.
Shown at 153:24 in Tango Tek2’s video.Check the blue number-one marker together
Have the player handling the lower beam check that it passes through the blue circle marked one. Tell your partner when the outgoing beam is heading upstairs so they can find its arrival point.
Route the upstairs beam through number two
Your partner catches the incoming beam, directs it through number two, and sends it back. Follow that returning beam to set up the lower receiving connection.
How do you align the Exotic Matter Laboratory sliding laser receiver?
Slide the movable relay until its downward beam reaches the lower node, then rotate it to restore the incoming connection and fine-tune the outgoing direction.
The movable relay lines up with the receiving node below.
Shown at 154:17 in Tango Tek2’s video.Let your partner point out the lower target
Have your partner stand beside the node you need to hit. Pull the movable relay across toward that position, keeping track of where its beam lands.
Alternate sliding and rotation
Moving the relay can make it lose the incoming beam. Rotate it after sliding, then make smaller corrections. If your partner calls that you have moved too far, bring it back rather than continuing in the same direction.
Give the beam a clear path around the corner
If the wall corner blocks the connection, aim toward the farther sphere socket behind your partner and continue adjusting. The corner can stop an otherwise promising route, so check the space between the relay and the target as well as the target itself.
A circular orb can still be the right crystal here. One player initially thought it looked wrong, then noticed it was already firing. Check the beam direction and the relay's position before swapping it out.
Why is this relay called numbered laser markers, spheres and pyramids, or a sliding laser receiver?
These names describe the route, the crystals, and the movable alignment device within the same puzzle.
- Exotic Matter Laboratory numbered laser markers: You follow the beam through numbered circles, including the blue number-one marker and number two upstairs.
- Exotic Matter Laboratory spheres and pyramids: You place differently shaped crystals to keep the beam on its plane or change planes.
- Exotic Matter Laboratory sliding laser receiver: You pull the movable relay across and rotate it to connect with the lower receiving node.
Once the final adjustment connects the relay, this alignment section is complete and more crystal routing follows.
The laboratory relay reaches its alignment completion feedback.
Shown at 155:30 in Tango Tek2’s video.Continue to the Master Emitter Crystal Configuration for the next crystal puzzle.