diff --git a/lib/TerrarumSansBitmap.jar b/lib/TerrarumSansBitmap.jar
index 1ca4a70fb..0472a05c6 100644
Binary files a/lib/TerrarumSansBitmap.jar and b/lib/TerrarumSansBitmap.jar differ
diff --git a/src/net/torvald/terrarum/App.java b/src/net/torvald/terrarum/App.java
index 465f7851e..738d8f95a 100644
--- a/src/net/torvald/terrarum/App.java
+++ b/src/net/torvald/terrarum/App.java
@@ -882,7 +882,6 @@ public class App implements ApplicationListener {
         ModMgr.INSTANCE.invoke(); // invoke Module Manager
 
 
-        TextureRegionPack.Companion.setGlobalFlipY(true);
         fontSmallNumbers = TinyAlphNum.INSTANCE;
 
         IME.invoke();
diff --git a/src/net/torvald/terrarum/modulebasegame/EntryPoint.kt b/src/net/torvald/terrarum/modulebasegame/EntryPoint.kt
index 7908f3844..a0bf02def 100644
--- a/src/net/torvald/terrarum/modulebasegame/EntryPoint.kt
+++ b/src/net/torvald/terrarum/modulebasegame/EntryPoint.kt
@@ -28,14 +28,6 @@ class EntryPoint : ModuleEntryPoint() {
 
         printdbg(this, "Hello, world!")
 
-        // the order of invocation is important! Material should be the first as blocks and items are depend on it.
-        ModMgr.GameMaterialLoader.invoke(moduleName)
-        ModMgr.GameItemLoader.invoke(moduleName)
-        ModMgr.GameBlockLoader.invoke(moduleName)
-        ModMgr.GameLanguageLoader.invoke(moduleName)
-
-
-
         // load common resources to the AssetsManager
         CommonResourcePool.addToLoadingList("$moduleName.items16") {
             TextureRegionPack(ModMgr.getGdxFile(moduleName, "items/items.tga"), 16, 16, flipY = true)
@@ -46,6 +38,17 @@ class EntryPoint : ModuleEntryPoint() {
         CommonResourcePool.addToLoadingList("$moduleName.items48") {
             TextureRegionPack(ModMgr.getGdxFile(moduleName, "items/items48.tga"), 48, 48, flipY = true)
         }
+        CommonResourcePool.addToLoadingList("inventory_category") {
+            TextureRegionPack("./assets/graphics/gui/inventory/category.tga", 20, 20, flipY = true)
+        }
+        CommonResourcePool.loadAll()
+
+
+        // the order of invocation is important! Material should be the first as blocks and items are depend on it.
+        ModMgr.GameMaterialLoader.invoke(moduleName)
+        ModMgr.GameItemLoader.invoke(moduleName)
+        ModMgr.GameBlockLoader.invoke(moduleName)
+        ModMgr.GameLanguageLoader.invoke(moduleName)
 
 
         /////////////////////////////////
diff --git a/src/net/torvald/terrarum/modulebasegame/gameactors/FixtureLogicSignalEmitter.kt b/src/net/torvald/terrarum/modulebasegame/gameactors/FixtureLogicSignalEmitter.kt
index f3da3c009..0be065a02 100644
--- a/src/net/torvald/terrarum/modulebasegame/gameactors/FixtureLogicSignalEmitter.kt
+++ b/src/net/torvald/terrarum/modulebasegame/gameactors/FixtureLogicSignalEmitter.kt
@@ -1,6 +1,9 @@
 package net.torvald.terrarum.modulebasegame.gameactors
 
+import com.badlogic.gdx.graphics.Texture
+import com.badlogic.gdx.graphics.g2d.TextureRegion
 import net.torvald.terrarum.CommonResourcePool
+import net.torvald.terrarum.ModMgr
 import net.torvald.terrarum.TerrarumAppConfiguration.TILE_SIZE
 import net.torvald.terrarum.gameactors.AVKey
 import net.torvald.terrarum.langpack.Lang
@@ -20,7 +23,13 @@ class FixtureLogicSignalEmitter : FixtureBase, Electric {
     )
 
     init {
-        println("INIT AGAIN FixtureLogicSignalEmitter")
+        CommonResourcePool.addToLoadingList("basegame-sprites-fixtures-signal_source.tga") {
+            val t = TextureRegion(Texture(ModMgr.getGdxFile("basegame", "sprites/fixtures/signal_source.tga")))
+            t.flip(false, false)
+            /*return*/t
+        }
+        CommonResourcePool.loadAll()
+
 
         density = 1400.0
         setHitboxDimension(TILE_SIZE, TILE_SIZE, 0, -1)
diff --git a/src/net/torvald/terrarum/modulebasegame/gameitems/FixtureItemBase.kt b/src/net/torvald/terrarum/modulebasegame/gameitems/FixtureItemBase.kt
new file mode 100644
index 000000000..3afc28d70
--- /dev/null
+++ b/src/net/torvald/terrarum/modulebasegame/gameitems/FixtureItemBase.kt
@@ -0,0 +1,59 @@
+package net.torvald.terrarum.modulebasegame.gameitems
+
+import com.badlogic.gdx.graphics.g2d.TextureRegion
+import net.torvald.terrarum.CommonResourcePool
+import net.torvald.terrarum.INGAME
+import net.torvald.terrarum.Terrarum
+import net.torvald.terrarum.gameactors.ActorWithBody
+import net.torvald.terrarum.gameitems.GameItem
+import net.torvald.terrarum.gameitems.ItemID
+import net.torvald.terrarum.gameitems.mouseInInteractableRange
+import net.torvald.terrarum.itemproperties.Material
+import net.torvald.terrarum.modulebasegame.TerrarumIngame
+import net.torvald.terrarum.modulebasegame.gameactors.FixtureBase
+
+/**
+ * Created by minjaesong on 2021-12-13.
+ */
+open class FixtureItemBase(originalID: ItemID, val makeFixture: () -> FixtureBase) : GameItem(originalID) {
+
+    protected val ghostItem = makeFixture()
+
+    override var dynamicID: ItemID = originalID
+    override val originalName = "FIXTUREBASE"
+    override var baseMass = 1.0
+    override var stackable = true
+    override var inventoryCategory = Category.MISC
+    override val isUnique = false
+    override val isDynamic = false
+    override val material = Material()
+    override val itemImage: TextureRegion
+        get() = CommonResourcePool.getAsTextureRegion("itemplaceholder_32")
+    override var baseToolSize: Double? = baseMass
+
+    override fun effectWhenEquipped(actor: ActorWithBody, delta: Float) {
+        (INGAME as TerrarumIngame).blockMarkingActor.let {
+            it.setGhost(ghostItem)
+            it.isVisible = true
+            it.update(delta)
+            it.setGhostColourBlock()
+            mouseInInteractableRange(actor) { it.setGhostColourAllow(); true }
+        }
+    }
+
+    override fun effectOnUnequip(actor: ActorWithBody, delta: Float) {
+        (INGAME as TerrarumIngame).blockMarkingActor.let {
+            it.unsetGhost()
+            it.isVisible = false
+            it.setGhostColourNone()
+        }
+    }
+
+    override fun startPrimaryUse(actor: ActorWithBody, delta: Float) = mouseInInteractableRange(actor) {
+        val item = makeFixture()
+
+        item.spawn(Terrarum.mouseTileX, Terrarum.mouseTileY - item.blockBox.height + 1)
+        // return true when placed, false when cannot be placed
+    }
+
+}
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/modulebasegame/gameitems/ItemLogicSignalEmitter.kt b/src/net/torvald/terrarum/modulebasegame/gameitems/ItemLogicSignalEmitter.kt
index f6b9fa49a..504dd2f82 100644
--- a/src/net/torvald/terrarum/modulebasegame/gameitems/ItemLogicSignalEmitter.kt
+++ b/src/net/torvald/terrarum/modulebasegame/gameitems/ItemLogicSignalEmitter.kt
@@ -1,18 +1,15 @@
 package net.torvald.terrarum.modulebasegame.gameitems
 
-import com.badlogic.gdx.graphics.Texture
 import com.badlogic.gdx.graphics.g2d.TextureRegion
 import net.torvald.terrarum.CommonResourcePool
-import net.torvald.terrarum.ModMgr
 import net.torvald.terrarum.Terrarum
 import net.torvald.terrarum.gameactors.ActorWithBody
-import net.torvald.terrarum.gameitems.GameItem
 import net.torvald.terrarum.gameitems.ItemID
 import net.torvald.terrarum.itemproperties.Material
 import net.torvald.terrarum.modulebasegame.TerrarumIngame
 import net.torvald.terrarum.modulebasegame.gameactors.FixtureLogicSignalEmitter
 
-class ItemLogicSignalEmitter(originalID: ItemID) : GameItem(originalID) {
+class ItemLogicSignalEmitter(originalID: ItemID) : FixtureItemBase(originalID, { FixtureLogicSignalEmitter() }) {
 
     override var dynamicID: ItemID = originalID
     override val originalName = "ITEM_LOGIC_SIGNAL_EMITTER"
@@ -27,28 +24,16 @@ class ItemLogicSignalEmitter(originalID: ItemID) : GameItem(originalID) {
     override var baseToolSize: Double? = baseMass
 
     init {
-        CommonResourcePool.addToLoadingList("basegame-sprites-fixtures-signal_source.tga") {
-            val t = TextureRegion(Texture(ModMgr.getGdxFile("basegame", "sprites/fixtures/signal_source.tga")))
-            t.flip(false, true)
-            /*return*/t
-        }
-        CommonResourcePool.loadAll()
-
         equipPosition = EquipPosition.HAND_GRIP
     }
 
-    override fun startPrimaryUse(actor: ActorWithBody, delta: Float): Boolean {
-        val item = FixtureLogicSignalEmitter()
-
-        return item.spawn(Terrarum.mouseTileX, Terrarum.mouseTileY)
-        // return true when placed, false when cannot be placed
-    }
-
     override fun effectWhenEquipped(actor: ActorWithBody, delta: Float) {
+        super.effectWhenEquipped(actor, delta)
         (Terrarum.ingame!! as TerrarumIngame).selectedWireRenderClass = "signal"
     }
 
     override fun effectOnUnequip(actor: ActorWithBody, delta: Float) {
+        super.effectOnUnequip(actor, delta)
         (Terrarum.ingame!! as TerrarumIngame).selectedWireRenderClass = ""
     }
 
diff --git a/src/net/torvald/terrarum/modulebasegame/gameitems/ItemStorageChest.kt b/src/net/torvald/terrarum/modulebasegame/gameitems/ItemStorageChest.kt
index 639a71504..1c074c0a0 100644
--- a/src/net/torvald/terrarum/modulebasegame/gameitems/ItemStorageChest.kt
+++ b/src/net/torvald/terrarum/modulebasegame/gameitems/ItemStorageChest.kt
@@ -2,11 +2,7 @@ package net.torvald.terrarum.modulebasegame.gameitems
 
 import com.badlogic.gdx.graphics.g2d.TextureRegion
 import net.torvald.terrarum.CommonResourcePool
-import net.torvald.terrarum.Terrarum
-import net.torvald.terrarum.gameactors.ActorWithBody
-import net.torvald.terrarum.gameitems.GameItem
 import net.torvald.terrarum.gameitems.ItemID
-import net.torvald.terrarum.gameitems.mouseInInteractableRange
 import net.torvald.terrarum.itemproperties.Material
 import net.torvald.terrarum.modulebasegame.gameactors.FixtureStorageChest
 import net.torvald.terrarum.modulebasegame.gameactors.FixtureTikiTorch
@@ -14,7 +10,7 @@ import net.torvald.terrarum.modulebasegame.gameactors.FixtureTikiTorch
 /**
  * Created by minjaesong on 2019-07-08.
  */
-class ItemStorageChest(originalID: ItemID) : GameItem(originalID) {
+class ItemStorageChest(originalID: ItemID) : FixtureItemBase(originalID, { FixtureStorageChest() }) {
 
     override var dynamicID: ItemID = originalID
     override val originalName = "ITEM_STORAGE_CHEST"
@@ -32,11 +28,4 @@ class ItemStorageChest(originalID: ItemID) : GameItem(originalID) {
         equipPosition = EquipPosition.HAND_GRIP
     }
 
-    override fun startPrimaryUse(actor: ActorWithBody, delta: Float) = mouseInInteractableRange(actor) {
-        val item = FixtureStorageChest()
-
-        item.spawn(Terrarum.mouseTileX, Terrarum.mouseTileY - item.blockBox.height + 1)
-        // return true when placed, false when cannot be placed
-    }
-
 }
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/modulebasegame/gameitems/ItemTikiTorch.kt b/src/net/torvald/terrarum/modulebasegame/gameitems/ItemTikiTorch.kt
index b10c7ab03..8787152d0 100644
--- a/src/net/torvald/terrarum/modulebasegame/gameitems/ItemTikiTorch.kt
+++ b/src/net/torvald/terrarum/modulebasegame/gameitems/ItemTikiTorch.kt
@@ -2,33 +2,14 @@ package net.torvald.terrarum.modulebasegame.gameitems
 
 import com.badlogic.gdx.graphics.g2d.TextureRegion
 import net.torvald.terrarum.CommonResourcePool
-import net.torvald.terrarum.INGAME
-import net.torvald.terrarum.ModMgr
-import net.torvald.terrarum.Terrarum
-import net.torvald.terrarum.gameactors.ActorWithBody
-import net.torvald.terrarum.gameitems.GameItem
 import net.torvald.terrarum.gameitems.ItemID
-import net.torvald.terrarum.gameitems.mouseInInteractableRange
 import net.torvald.terrarum.itemproperties.Material
-import net.torvald.terrarum.modulebasegame.TerrarumIngame
 import net.torvald.terrarum.modulebasegame.gameactors.FixtureTikiTorch
-import net.torvald.terrarumsansbitmap.gdx.TextureRegionPack
 
 /**
  * Created by minjaesong on 2019-05-16.
  */
-class ItemTikiTorch(originalID: ItemID) : GameItem(originalID) {
-
-    companion object {
-        private val ghostTorch = FixtureTikiTorch()
-    }
-
-    init {
-        CommonResourcePool.addToLoadingList("sprites-fixtures-tiki_torch.tga") {
-            TextureRegionPack(ModMgr.getGdxFile("basegame", "sprites/fixtures/tiki_torch.tga"), 16, 32, flipY = true)
-        }
-        CommonResourcePool.loadAll()
-    }
+class ItemTikiTorch(originalID: ItemID) : FixtureItemBase(originalID, { FixtureTikiTorch() }) {
 
     override var dynamicID: ItemID = originalID
     override val originalName = "ITEM_TIKI_TORCH"
@@ -46,30 +27,4 @@ class ItemTikiTorch(originalID: ItemID) : GameItem(originalID) {
         equipPosition = EquipPosition.HAND_GRIP
     }
 
-    override fun effectWhenEquipped(actor: ActorWithBody, delta: Float) {
-        (INGAME as TerrarumIngame).blockMarkingActor.let {
-            it.setGhost(ghostTorch)
-            it.isVisible = true
-            it.update(delta)
-            it.setGhostColourBlock()
-            mouseInInteractableRange(actor) { it.setGhostColourAllow(); true }
-        }
-    }
-
-    override fun effectOnUnequip(actor: ActorWithBody, delta: Float) {
-        (INGAME as TerrarumIngame).blockMarkingActor.let {
-            it.unsetGhost()
-            it.isVisible = false
-            it.setGhostColourNone()
-        }
-    }
-
-    override fun startPrimaryUse(actor: ActorWithBody, delta: Float) = mouseInInteractableRange(actor) {
-        val item = FixtureTikiTorch()
-
-        item.spawn(Terrarum.mouseTileX, Terrarum.mouseTileY - item.blockBox.height + 1)
-        // return true when placed, false when cannot be placed
-
-    }
-
 }
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/modulebasegame/ui/UIInventoryFull.kt b/src/net/torvald/terrarum/modulebasegame/ui/UIInventoryFull.kt
index bca23001b..5bc4843d0 100644
--- a/src/net/torvald/terrarum/modulebasegame/ui/UIInventoryFull.kt
+++ b/src/net/torvald/terrarum/modulebasegame/ui/UIInventoryFull.kt
@@ -14,7 +14,6 @@ import net.torvald.terrarum.modulebasegame.gameactors.ActorHumanoid
 import net.torvald.terrarum.ui.Toolkit
 import net.torvald.terrarum.ui.UICanvas
 import net.torvald.terrarum.ui.UIItemHorizontalFadeSlide
-import net.torvald.terrarumsansbitmap.gdx.TextureRegionPack
 
 /**
  * Created by minjaesong on 2017-10-21.
@@ -112,10 +111,6 @@ class UIInventoryFull(
 
     init {
         handler.allowESCtoClose = true
-        CommonResourcePool.addToLoadingList("inventory_category") {
-            TextureRegionPack("./assets/graphics/gui/inventory/category.tga", 20, 20)
-        }
-        CommonResourcePool.loadAll()
     }
 
     private val SP = "\u3000 "
diff --git a/src/net/torvald/terrarum/modulebasegame/ui/UIKeyboardControlPanel.kt b/src/net/torvald/terrarum/modulebasegame/ui/UIKeyboardControlPanel.kt
index f551c024d..01354e92f 100644
--- a/src/net/torvald/terrarum/modulebasegame/ui/UIKeyboardControlPanel.kt
+++ b/src/net/torvald/terrarum/modulebasegame/ui/UIKeyboardControlPanel.kt
@@ -19,10 +19,6 @@ import net.torvald.terrarumsansbitmap.gdx.TextureRegionPack
 class UIKeyboardControlPanel(remoCon: UIRemoCon?) : UICanvas() {
 
     init {
-        CommonResourcePool.addToLoadingList("inventory_category") {
-            TextureRegionPack("assets/graphics/gui/inventory/category.tga", 20, 20)
-        }
-        CommonResourcePool.loadAll()
     }
 
     private val labels = CommonResourcePool.getAsTextureRegionPack("inventory_category")
diff --git a/src/net/torvald/terrarum/modulebasegame/ui/UILoadDemoSavefiles.kt b/src/net/torvald/terrarum/modulebasegame/ui/UILoadDemoSavefiles.kt
index 141e291e0..ea23f3b07 100644
--- a/src/net/torvald/terrarum/modulebasegame/ui/UILoadDemoSavefiles.kt
+++ b/src/net/torvald/terrarum/modulebasegame/ui/UILoadDemoSavefiles.kt
@@ -77,9 +77,6 @@ class UILoadDemoSavefiles(val remoCon: UIRemoCon) : UICanvas() {
 //    private val hash = RandomWordsName(3)
 
     init {
-        CommonResourcePool.addToLoadingList("inventory_category") {
-            TextureRegionPack("./assets/graphics/gui/inventory/category.tga", 20, 20)
-        }
         CommonResourcePool.addToLoadingList("terrarum-defaultsavegamethumb") {
             TextureRegion(Texture(Gdx.files.internal("assets/graphics/gui/savegame_thumb_placeholder.png")))
         }
diff --git a/src/net/torvald/terrarum/ui/UIItemSpinner.kt b/src/net/torvald/terrarum/ui/UIItemSpinner.kt
index baae44370..12ec82317 100644
--- a/src/net/torvald/terrarum/ui/UIItemSpinner.kt
+++ b/src/net/torvald/terrarum/ui/UIItemSpinner.kt
@@ -7,7 +7,6 @@ import com.badlogic.gdx.graphics.Pixmap
 import com.badlogic.gdx.graphics.g2d.SpriteBatch
 import com.badlogic.gdx.graphics.glutils.FrameBuffer
 import net.torvald.terrarum.*
-import net.torvald.terrarumsansbitmap.gdx.TextureRegionPack
 
 /**
  * Created by minjaesong on 2021-10-23.
@@ -25,10 +24,6 @@ class UIItemSpinner(
 ) : UIItem(parentUI, initialX, initialY) {
 
     init {
-        CommonResourcePool.addToLoadingList("inventory_category") {
-            TextureRegionPack("assets/graphics/gui/inventory/category.tga", 20, 20)
-        }
-        CommonResourcePool.loadAll()
     }
 
     private val labels = CommonResourcePool.getAsTextureRegionPack("inventory_category")
diff --git a/src/net/torvald/terrarum/ui/UIItemTextLineInput.kt b/src/net/torvald/terrarum/ui/UIItemTextLineInput.kt
index bbd40a206..57fe40d1e 100644
--- a/src/net/torvald/terrarum/ui/UIItemTextLineInput.kt
+++ b/src/net/torvald/terrarum/ui/UIItemTextLineInput.kt
@@ -67,10 +67,6 @@ class UIItemTextLineInput(
 ) : UIItem(parentUI, initialX, initialY) {
 
     init {
-        CommonResourcePool.addToLoadingList("inventory_category") {
-            TextureRegionPack("assets/graphics/gui/inventory/category.tga", 20, 20)
-        }
-        CommonResourcePool.loadAll()
     }
 
     private val labels = CommonResourcePool.getAsTextureRegionPack("inventory_category")
diff --git a/src/net/torvald/terrarum/ui/UIItemTextSelector.kt b/src/net/torvald/terrarum/ui/UIItemTextSelector.kt
index b89955f83..b073f8a86 100644
--- a/src/net/torvald/terrarum/ui/UIItemTextSelector.kt
+++ b/src/net/torvald/terrarum/ui/UIItemTextSelector.kt
@@ -27,10 +27,6 @@ class UIItemTextSelector(
 ) : UIItem(parentUI, initialX, initialY) {
 
     init {
-        CommonResourcePool.addToLoadingList("inventory_category") {
-            TextureRegionPack("assets/graphics/gui/inventory/category.tga", 20, 20)
-        }
-        CommonResourcePool.loadAll()
     }
 
     override val mouseUp: Boolean