This is the second chamber of the additional Peer Review testing course, Art Therapy. This chamber uses the mechanics of transporting discouragement redirection cubes and its lasers with excursion funnels as well blocking them with hard light bridges.
Place a portal at the end of the excursion funnel, then place another one on the wall to the right, so that the funnel goes into the window.
Place a portal on the lowest part of the wall to your left as you enter the chamber, then place another one on the wall to the right, so that it is directly above atlas's second portal.
Hold the Discouragement Redirection Cube under the laser, so that it redirects the laser through both of your portals and onto the laser receptor, disabling the Material Emancipation Grill in the window.
Travel through the excursion funnel to end up in the window, and place a portal at the end of the light bridge.
Place your other portal one portal-width away from the top left of the wall to your left as you enter the chamber.
Place a portal at the end of the excursion funnel, then place another one on the wall to the right, directly opposite the leftmost laser receptor.
Put the Discouragement Redirection Cube in the excursion funnel so that it will eventually get caught on the light bridge and redirect the laser to the receptor.
Before the cube reaches the light bridge, get on the elevator so that you are there once it starts moving.