Da Vinci Code objects

The Easter Eggs are literal Easter Eggs that appear in Halo 3 's multiplayer maps Sandtrap and Sandbox. The eggs are located near or inside large, tower-like Forerunner structures, and in both levels serve to keep the player from exiting the level.

Description
  In Sandtrap, the Eggs fire orange beams into the sand whenever a player tries to exit the map; these beams activate Brute Landmines that are buried along the level's perimeter. In Sandbox, the Eggs fire subtler but more powerful beams directly at escaping players, killing such players almost instantly. In both cases, the Eggs' kills are attributed to The Guardians.

To get a closer look at the Eggs in Sandtrap, you'll need to overload the boundaries using Trip Mines, and then walk outside of the map. From there, you must use Theater to fast forward to where you exited the map, detach the camera, and fly up to the upper portions of the towers, where the Eggs can be seen. It is also possible to look at the UNSC Aegis Fate using this method; the camera can be moved into its hangar.

To see the eggs on Sandbox, two players must cooperate. One player (Person A) must, while in Edit Mode, exit the map from the Sky Bubble by spawning a Teleporter outside of the map. Person A must then fly to a tower (but watch out for kill barriers) and spawn a turret against the light in the tower. A second player (Person B) must then man the turret and have Person A pick the turret up. Person A should drag Person B up the wall while B is still against it. Towards the middle of the light, the Easter Egg can be seen. Another DaVinci Egg has been discovered above Sandbox, however, due to lag out, was not discovered during the next Forge session. Sandbox DaVinci Egg #2

Trivia

 * In both levels, the Eggs are textured using a UV-unwrapped image (used to help artists paint textures onto 3D models).
 * The Eggs textures' consist of a grid, with each tile containing a letter of the alphabet. This odd appearance has earned the Eggs the nickname "Da Vinci Eggs".
 * The Sandbox Eggs' beams can be blocked with Forge Objects, rendering the Eggs harmless; Bubble Shields also provide temporary protection.