This clip from TrackMania² Canyon shows what happens when 3 dudes decide to fill a single video game car track with 100,000 cars. Because the game can only handle about 6,000 cars at once, the team had to invent clever green-screen layers, depth maps, and compositing tricks to make every car exist “at the same time.” Seventeen extra layers, custom rendering workflows, and years of patience later, the result is… well, it left me without words.

Things really go off the rails around 1:45, and once it starts, it’s impossible to look away.

[Via BIS]