Navigate LASERS in Portal Reloaded Guide

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Walkthrough

1
Test Chamber 13: Place portals as shown to move the laser sideways. Use a time portal to send the laser into the future. Travel through the time portal (taking damage is acceptable) to reach the future. Rearrange portals in the future so the laser hits the target. Head through the door.
2
Test Chamber 14: Travel to the present via a time portal. Summon a reflector cube and position it in the present as shown. Use a portal to direct a laser through the first node, then use the reflector cube to direct it into the next two nodes. Travel to the future. Use portals to bring a laser into the present through the time portal, ensuring it passes through the node. Retrieve the reflector cube from the future and bring it to the present via a time portal. Position the present reflector cube to hit all three nodes. If necessary, return to the future to retrieve the future reflector cube and bring it back to the present. Place the future reflector cube at the end of the nodes to reflect the laser into the receiver, completing the chamber.
3
Test Chamber 15: Go through the particle field to the left. Place a portal where the laser hits the wall and a time portal on the opposite wall. Travel through the time portal to the future to bypass the particle field. Proceed to the other side of the room and use another time portal to return to the present, positioning yourself beyond the particle field. Place a new portal on the upper wall above the laser room so the laser hits the first receiver. Travel back to the future and place a portal on the small wall in the laser room to direct the laser at the receiver. Return to the present. An elevating platform near the switch will power up. Stand on it and place a time portal behind the node to raise the platform further, allowing you to summon a reflector cube. Place this reflector cube on the lip above the second receiver. Travel to the future. Retrieve the future reflector cube and bring it back to the present via a time portal placed within the laser room. Position it to reflect the laser into the second receiver through the node. To reach the other side of the particle field without passing through it, use a portal on the other side or a time portal. Once in the present on the other side, climb the stairs and place a portal on the upper wall to hit the third receiver. Finally, move the reflector cube onto the switch to complete the test chamber.

Tips

In Test Chamber 13, you can take damage from the laser to travel into the future.
In Test Chamber 14, ensure the reflector cube in the present is positioned correctly to hit all three nodes. You may need to retrieve the future reflector cube multiple times.
In Test Chamber 15, be mindful of the particle field and use time portals strategically to bypass it. The final step involves placing a reflector cube on a switch after hitting the third receiver.