Queue lab research from local stock

PlanetSurfaceController.gd

@@ -18,6 +18,12 @@ var transitioning: bool = false
 
 
 func _ready() -> void:
+	if GameState.planet_type == "gas_giant":
+		# A gas giant is not lunar terrain: its surface view uses a deep,
+		# coloured atmosphere instead of the rocky field.
+		get_node("../RockField").visible = false
+		get_node("../GasVentField").visible = true
+		get_node("../BackgroundLayer/LunarBackground").color = Color(0.16, 0.035, 0.26, 1.0)
 	fleet.spawn_ships(GameState.surviving_ship_count, Vector2.ZERO)
 	camera.position = Vector2.ZERO
 	camera.zoom = Vector2(GameState.return_camera_zoom, GameState.return_camera_zoom)