Hello, and again, welcome to the Aperture Science computer aided enrichment center! This next chamber is infinite. Meaning there are no walls to shoot portals onto... Oh well. You can just sit and admire your companion cube.. Forever... *Computerized Laughing* Ha-Ha-Ha! This is a 3D portal engine I made! Arrow Keys or WASD - move Z/X or Q/E - change portal color Clicking will shoot a portal... If you find a wall to shoot onto... *More Computerized Laughing* Ha-Ha-Ha!