added a small storage contianer, fixed the damn item slot (i relly think they are done now)

Objects/Scripts/IItemSlot.gd

@@ -3,6 +3,7 @@ extends StaticBody3D
 @export var isFirstPlace = true
 
 func _ready() -> void:
+	# Defers execution slightly to guarantee MeshInstance3D has finished mounting
 	initialize_material.call_deferred()
 
 func initialize_material() -> void:
@@ -10,8 +11,13 @@ func initialize_material() -> void:
 	$MeshInstance3D.material_override.albedo_color = Color("00000041")
 	
 	if isFirstPlace:
+		# Freshly placed machine in the world defaults to air
 		placeItem("base:air")
 		isFirstPlace = false
+	else:
+		# The machine was loaded from a save! Restore the data that was saved on the parent
+		if $"..".ItemID != "" and $"..".ItemID != "base:air":
+			placeItem($"..".ItemID)
 
 func startHighlight():
 	$MeshInstance3D.material_override.albedo_color = Color("00FF0041")
@@ -30,6 +36,7 @@ func placeItem(ItemID: String):
 		$"..".ItemTexture = itemResource.texture
 	$"..".ItemID = itemResource.ID
 	
+	# Mark initialized so it saves its state properly
 	isFirstPlace = false 
 	
 func removeItem():
@@ -42,6 +49,6 @@ func _interact_press(isRight):
 			placeItem(MainGame.currentHeldItemID)
 			InventoryBus.removeHeldItem.emit()
 	elif isRight:
-		if $"..".ItemID != "base:air":
+		if $"..".ItemID != "base:air" and $"..".ItemID != "":
 			InventoryBus.givePlayerItem.emit($"..".ItemID)
 			removeItem()

Objects/Scripts/SItemSlot.gd

@@ -3,6 +3,7 @@ extends Node3D
 signal removeItemS
 signal placeItemS(ID: String)
 
+# Simple export storage properties that Godot's PackedScene can easily serialize
 @export_storage var ItemTexture: Texture2D:
 	set(value):
 		ItemTexture = value
@@ -19,7 +20,7 @@ func update_visuals() -> void:
 			$Sprite3D.texture = ItemTexture
 			$Sprite3D.pixel_size = 0.2 / ItemTexture.get_height()
 		else:
-			$Sprite3D.texture = null
+			$Sprite3D.texture = null # This safely wipes the image when null is passed
 
 func placeItem(ID: String):
 	$StaticBody3D.placeItem(ID)