If the script object is already created, it will reset the script object to initial position and state. The objects will be unhidden by default.
Example:
group_create("mission 1 characters", true)
Creates all objects in the "mission 1 characters" group and waits for them to stream in.
Notes:
- before group_create() is called, script objects in the group don�t exist, so they don�t need to be hidden
- also, this means that any script commands using those script objects must come AFTER the group_create() call; otherwise those commands will do nothing
- group_create() call should probably go in mission_start() rather than mission_setup(), as in the final game, the player might have several missions open at once