Changes the state of an object on the map.
A (partial) list of documented Field Objects can be found here.
State Change ID : Byte (hex)
Most maps do not have objects that have many states, and there is no easy way to know which are.
In some cases (perhaps all cases, as this is untested thoroughly), the ID references a Textured Animation ID as defined in a Mesh Resource.
x00 : Byte (hex)
This value is always set to x00 in the original game; it probably doesn't have a function.