* `light_definition` is a table with the following optional fields:
* `shadows` is a table that controls ambient shadows
* `intensity` sets the intensity of the shadows from 0 (no shadows, default) to 1 (blackness)
- * Returns true on success.
* `get_lighting()`: returns the current state of lighting for the player.
* Result is a table with the same fields as `light_definition` in `set_lighting`.