diff --git a/assets/mods/basegame/sprites/fixtures/signal_blocker.tga b/assets/mods/basegame/sprites/fixtures/signal_blocker.tga
index e30ad94f4..8ddaf93aa 100644
--- a/assets/mods/basegame/sprites/fixtures/signal_blocker.tga
+++ b/assets/mods/basegame/sprites/fixtures/signal_blocker.tga
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:cb8884869a534612bf6689ece5f82caa59117a745b2aa48523de0998974c1554
-size 32786
+oid sha256:3c0dc17146be580e68938f22f7072e166e836500fc95026d471536a80ea72f3e
+size 262162
diff --git a/assets/mods/basegame/sprites/fixtures/signal_blocker_emsv.tga b/assets/mods/basegame/sprites/fixtures/signal_blocker_emsv.tga
new file mode 100644
index 000000000..a96ddc7b3
--- /dev/null
+++ b/assets/mods/basegame/sprites/fixtures/signal_blocker_emsv.tga
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:62a14017b8622f02aba0a0ab6a3b4c58ba5003a1731fa84712569d9f7fc9e7dc
+size 262162
diff --git a/src/net/torvald/terrarum/modulebasegame/gameactors/FixtureSignalBlocker.kt b/src/net/torvald/terrarum/modulebasegame/gameactors/FixtureSignalBlocker.kt
index ca94c889d..20e13e300 100644
--- a/src/net/torvald/terrarum/modulebasegame/gameactors/FixtureSignalBlocker.kt
+++ b/src/net/torvald/terrarum/modulebasegame/gameactors/FixtureSignalBlocker.kt
@@ -1,7 +1,6 @@
 package net.torvald.terrarum.modulebasegame.gameactors
 
-import com.badlogic.gdx.graphics.g2d.SpriteBatch
-import net.torvald.terrarum.App.printdbg
+import net.torvald.spriteanimation.SheetSpriteAnimation
 import net.torvald.terrarum.TerrarumAppConfiguration.TILE_SIZE
 import net.torvald.terrarum.langpack.Lang
 import net.torvald.terrarum.modulebasegame.gameitems.FixtureItemBase
@@ -79,13 +78,18 @@ class FixtureSignalBlocker : Electric, Reorientable {
 
     init {
         val itemImage = FixtureItemBase.getItemImageFromSingleImage("basegame", "sprites/fixtures/signal_blocker.tga")
+        val itemImage2 = FixtureItemBase.getItemImageFromSingleImage("basegame", "sprites/fixtures/signal_blocker_emsv.tga")
 
         density = 1400.0
         setHitboxDimension(2*TILE_SIZE, 2*TILE_SIZE, 0, 1)
 
         makeNewSprite(TextureRegionPack(itemImage.texture, 2*TILE_SIZE, 2*TILE_SIZE)).let {
-            it.setRowsAndFrames(8,4)
-            it.delays = floatArrayOf(Float.POSITIVE_INFINITY, Float.POSITIVE_INFINITY)
+            it.setRowsAndFrames(16,4)
+            it.delays = FloatArray(8) { Float.POSITIVE_INFINITY }
+        }
+        makeNewSpriteEmissive(TextureRegionPack(itemImage2.texture, 2*TILE_SIZE, 2*TILE_SIZE)).let {
+            it.setRowsAndFrames(16,4)
+            it.delays = FloatArray(8) { Float.POSITIVE_INFINITY }
         }
 
         setEmitterAndSink()
@@ -124,6 +128,17 @@ class FixtureSignalBlocker : Electric, Reorientable {
             else -> throw IllegalStateException("Orientation not in range ($orientation)")
         }
         setWireEmissionAt(x, y, Vector2(I nimply J, 0.0))
+
+        // update sprite
+        val one = getWireStateAt(0, 0).x >= ELECTIC_THRESHOLD_HIGH
+        val two = getWireStateAt(1, 0).x >= ELECTIC_THRESHOLD_HIGH
+        val four = getWireStateAt(0, 1).x >= ELECTIC_THRESHOLD_HIGH
+        val eight = getWireStateAt(1, 1).x >= ELECTIC_THRESHOLD_HIGH
+
+        val state = one.toInt(0) or two.toInt(1) or four.toInt(2) or eight.toInt(3)
+
+        (sprite as SheetSpriteAnimation).currentRow = state
+        (spriteEmissive as SheetSpriteAnimation).currentRow = state
     }
 
     override fun onRisingEdge(readFrom: BlockBoxIndex) {
@@ -144,7 +159,4 @@ class FixtureSignalBlocker : Electric, Reorientable {
 
     private infix fun Boolean.nimply(other: Boolean) = (this && !other).toInt().toDouble()
 
-    override fun drawBody(frameDelta: Float, batch: SpriteBatch) {
-        super.drawBody(frameDelta, batch)
-    }
 }
\ No newline at end of file