fix snow and exposure

core/environment_config.gd

@@ -158,6 +158,8 @@ extends Resource
 @export_group("Train Start")
 @export var train_start_from_random_position: bool = true #When enabled the train starts from a random offset on the rail curve instead of a stop
 @export_range(0, 64, 1, "or_greater") var train_start_stop_index: int = 1 #Stop index used for the train start when random start is disabled
+@export var train_start_delay_seconds: float = 3.0 #Seconds the train waits before starting at game launch
+@export var train_start_acceleration_seconds: float = 4.0 #Seconds used to progressively reach normal train speed after launch
 
 #Snow settings
 @export_group("Snow")