How to redirect the lasers in Testchamber 19 in Chapter 4

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I'm stuck again, this time in Testchamber 19 in Chapter 4.

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I've used the cubicle on the ground to change the angle of the laser on the right. I also know there's are cubicles to the left and right of where you enter Testchamber 19.

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But I couldn't find a way to make use of Portals to get to get to those cubicles. So any hints as to what I should do next?

Best Answer

  • You have already obtained the first cube, which was on the floor.

  • Obtain the cube to your left, at the ceiling you can place a Portal and then walk into a wall.

  • Obtain the second cube by using the aerial faith plate. Place a portal above it and on the floor, then in mid-air fire another portal to where I aimed the cursor.

  • Then, use laser chaining to open the door.

  • Then, use laser chaining to kill the turrets and then raise the platform. After that you can use the aerial faith plate trick with the floor again and shoot a portal where I aim the cursor…

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