diff --git a/src/net/torvald/terrarum/gameactors/BlockMarkerActor.kt b/src/net/torvald/terrarum/gameactors/BlockMarkerActor.kt
index 1bf649421..6d177eac2 100644
--- a/src/net/torvald/terrarum/gameactors/BlockMarkerActor.kt
+++ b/src/net/torvald/terrarum/gameactors/BlockMarkerActor.kt
@@ -13,7 +13,7 @@ import kotlin.math.floor
 /**
  * Used as construction markers and fixture ghost images
  */
-class BlockMarkerActor : ActorWithBody(Actor.RenderOrder.OVERLAY, physProp = PhysProperties.MOBILE_OBJECT) {
+class BlockMarkerActor : ActorWithBody(Actor.RenderOrder.OVERLAY, physProp = PhysProperties.MOBILE_OBJECT), NoSerialise {
 
     private val defaultSize = 16.0
 
diff --git a/src/net/torvald/terrarum/gameactors/NoSerialise.kt b/src/net/torvald/terrarum/gameactors/NoSerialise.kt
new file mode 100644
index 000000000..0a2ffe1bb
--- /dev/null
+++ b/src/net/torvald/terrarum/gameactors/NoSerialise.kt
@@ -0,0 +1,6 @@
+package net.torvald.terrarum.gameactors
+
+/**
+ * Created by minjaesong on 2022-09-02.
+ */
+interface NoSerialise
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/gameactors/WireActor.kt b/src/net/torvald/terrarum/gameactors/WireActor.kt
index 187539129..fc9473040 100644
--- a/src/net/torvald/terrarum/gameactors/WireActor.kt
+++ b/src/net/torvald/terrarum/gameactors/WireActor.kt
@@ -11,7 +11,7 @@ import net.torvald.terrarum.gameitems.ItemID
  *
  * Created by minjaesong on 2021-07-30.
  */
-class WireActor : ActorWithBody {
+class WireActor : ActorWithBody, NoSerialise {
 
     companion object {
         val WIRE_NEARBY = arrayOf(
diff --git a/src/net/torvald/terrarum/modulebasegame/gameactors/IngamePlayer.kt b/src/net/torvald/terrarum/modulebasegame/gameactors/IngamePlayer.kt
index 07260d3dd..d6b7bc985 100644
--- a/src/net/torvald/terrarum/modulebasegame/gameactors/IngamePlayer.kt
+++ b/src/net/torvald/terrarum/modulebasegame/gameactors/IngamePlayer.kt
@@ -1,23 +1,16 @@
 package net.torvald.terrarum.modulebasegame.gameactors
 
 import com.badlogic.gdx.Gdx
-import com.badlogic.gdx.graphics.Texture
 import com.badlogic.gdx.graphics.g2d.TextureRegion
 import net.torvald.spriteanimation.HasAssembledSprite
-import net.torvald.spriteanimation.SpriteAnimation
-import net.torvald.terrarum.spriteassembler.ADProperties
-import net.torvald.terrarum.spriteassembler.AssembleSheetPixmap
 import net.torvald.terrarum.App
 import net.torvald.terrarum.Terrarum
 import net.torvald.terrarum.gameactors.AVKey
-import net.torvald.terrarum.gameitems.GameItem
-import net.torvald.terrarum.gameitems.ItemID
+import net.torvald.terrarum.gameactors.NoSerialise
 import net.torvald.terrarum.itemproperties.ItemRemapTable
 import net.torvald.terrarum.itemproperties.ItemTable
-import net.torvald.terrarum.savegame.DiskSkimmer
-import net.torvald.terrarum.savegame.SimpleFileSystem
+import net.torvald.terrarum.spriteassembler.ADProperties
 import net.torvald.terrarum.utils.PlayerLastStatus
-import net.torvald.terrarumsansbitmap.gdx.TextureRegionPack
 import java.util.*
 
 
@@ -27,7 +20,7 @@ import java.util.*
  * Created by minjaesong on 2015-12-31.
  */
 
-class IngamePlayer : ActorHumanoid, HasAssembledSprite {
+class IngamePlayer : ActorHumanoid, HasAssembledSprite, NoSerialise {
 
     val creationTime = App.getTIME_T()
     var lastPlayTime = App.getTIME_T() // cumulative value for the savegame
diff --git a/src/net/torvald/terrarum/serialise/WriteWorld.kt b/src/net/torvald/terrarum/serialise/WriteWorld.kt
index 6e8420834..4037e2306 100644
--- a/src/net/torvald/terrarum/serialise/WriteWorld.kt
+++ b/src/net/torvald/terrarum/serialise/WriteWorld.kt
@@ -1,10 +1,8 @@
 package net.torvald.terrarum.serialise
 
-import net.torvald.terrarum.CommonResourcePool
 import net.torvald.terrarum.ItemCodex
-import net.torvald.terrarum.ReferencingRanges
 import net.torvald.terrarum.gameactors.Actor
-import net.torvald.terrarum.gameactors.BlockMarkerActor
+import net.torvald.terrarum.gameactors.NoSerialise
 import net.torvald.terrarum.gameworld.BlockLayer
 import net.torvald.terrarum.gameworld.GameWorld
 import net.torvald.terrarum.gameworld.GameWorldTitleScreen
@@ -25,10 +23,7 @@ import java.io.Reader
 object WriteWorld {
 
     fun actorAcceptable(actor: Actor): Boolean {
-        return actor.referenceID !in ReferencingRanges.ACTORS_WIRES &&
-               actor.referenceID !in ReferencingRanges.ACTORS_WIRES_HELPER &&
-               actor != (CommonResourcePool.get("blockmarking_actor") as BlockMarkerActor) &&
-               actor !is IngamePlayer // IngamePlayers must not be saved with the world
+        return actor !is NoSerialise // IngamePlayers is also NoSerialised because they must not be saved with the world
     }
 
     private fun preWrite(ingame: TerrarumIngame, time_t: Long, actorsList: List<Actor>, playersList: List<IngamePlayer>): GameWorld {