Fingerprint Cloner

Test Chamber 13: Place portals as shown to redirect the laser. Use a time portal to move the laser into the future. Enter the future, rearrange portals to direct the laser into the target, and exit through the door.

Test Chamber 14: Travel to the present. Summon a reflector cube and position it to direct a laser through the first node. Travel to the future. Use portals to bring a laser into the present through the time portal, ensuring it hits the node. Retrieve the reflector cube from the future and bring it to the present. Position the present reflector cube to hit all three nodes. Travel back to the future to retrieve the future reflector cube again, bringing it to the present via a time portal. Position this cube to reflect the laser into the receiver to complete the chamber.

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 reach the future, bypassing the particle field. Return to the present using another time portal to be on the other side of the field. Place a portal to direct the laser to the first receiver. Travel to the future and place a portal on the small wall in the laser room to hit the second receiver. Return to the present. Stand on the elevating platform powered by the first receiver and node. Shoot a time portal behind the node to raise the platform further, 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 to the present via a time portal in the laser room. Position it to reflect the laser through the node into the second receiver. To reach the other side of the particle field in the present, use a portal or time portal to bypass it. Climb the stairs and use a portal on the upper wall to hit the third receiver. Finally, move the reflector cube onto the switch to complete the chamber.