The material property sets the material ID of a an object. This ID
is used when objects collide with each other such as playerControlObjects
or projeciles.
Example:
In this example the material is 216, this refers to a material defined
in the damage_system folder in the game.rfa. Each material defines
how much damge it does to other materials.
If you see material2, this refers to splash damage. Material is direct
damage.