Master LASERS in Portal Reloaded: Test Chambers 13-15

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Walkthrough

1
Test Chamber 13: Place portals as shown in the image to redirect the laser. Use a time portal to move the laser into the future. Once in the future, rearrange portals to direct the laser into the target and exit the chamber.
2
Test Chamber 14: Travel to the present via a time portal. Summon a reflector cube and position it as shown. Use portals to bring a laser through the first node and reflect it into the next two. 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. Adjust 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. Position the future reflector cube to reflect the laser into the receiver, completing the chamber.
3
Test Chamber 15: Pass 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 on the other side of the particle field. Place a portal on the upper wall above the laser room to direct the laser to the first receiver. Travel to the future and place a portal in the laser room to shoot the receiver. Return to the present; the laser should be hitting the first receiver, powering an elevating platform. Stand on the platform and place a time portal behind the node. This will raise the platform, allowing you to summon a reflector cube. Place this 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 in 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 going through it, use a portal on the other side or a time portal. In the present, on the other side of the particle field, 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 chamber.

Tips

In Test Chamber 13, you can take some damage from the laser to travel into the future.
In Test Chamber 14, ensure the reflector cube in the present is correctly positioned to hit all three nodes.
In Test Chamber 15, be mindful of the particle field and use time portals strategically to bypass it.
Pay close attention to the placement of reflector cubes and portals in Test Chamber 15 to ensure the lasers hit the correct receivers.