From Armagetron Advanced Wiki
Editing and Creating a Moviepack
The custom start page before the menu (only works in 2.7 +) (the thunderbolt page when using default textures)
The bike model, make one using your favorite 3d modeling system.
The skin for your bike model. Transperent parts of the image will show the color each player has selected for his bike/wall. If the model appears to be grey in the game, open the ase model in a text editor like notepad and make sure the path of the texture is correct.
Player Wall Texture
The skin for player walls. Transperent parts will be invisable in game, White will show the color the player has selected. -note while using colors here is tempting its not recomended as the colors are often distorted in the game.
Floor.png works like a tile and is tiled across the floor with no variation you can use a small image like 50px50p and tile it or a larger image like 500px500p and stretch it across the entire floor.
floor_a.png is normally a line just stretched vertically across the floor and floor_b.png the same only stretched horizontaly by combining the two it creates a sharp square grid. There have been people who thought they could use this to create a very sharp unique floor.
The 4 images are used to make the outer wall make one image and copy it for a look that spans the whole grid or try using 2 patterns for a unique look.
The sky image can help the whole movie pack together in game but not everyone uses a sky so don't depend on it.
Use this to unify the look of your movie pack no matter who uses it
MOVIEPACK_FLOOR_RED .8 floor color (with moviepack) MOVIEPACK_FLOOR_GREEN 1 floor color (with moviepack) MOVIEPACK_FLOOR_BLUE .6 floor color (with moviepack) MOVIEPACK_WALL_STRETCH 6 GRID_SIZE_MOVIEPACK 5