diff --git a/src/net/torvald/terrarum/serialise/WriteMeta.kt b/src/net/torvald/terrarum/serialise/WriteMeta.kt
index e6f483e0c..711cc9835 100644
--- a/src/net/torvald/terrarum/serialise/WriteMeta.kt
+++ b/src/net/torvald/terrarum/serialise/WriteMeta.kt
@@ -3,9 +3,12 @@ package net.torvald.terrarum.serialise
 import com.badlogic.gdx.utils.Json
 import com.badlogic.gdx.utils.JsonWriter
 import net.torvald.terrarum.ModMgr
+import net.torvald.terrarum.gameworld.BlockLayer
 import net.torvald.terrarum.modulebasegame.TerrarumIngame
 import net.torvald.terrarum.modulebasegame.worldgenerator.RoguelikeRandomiser
+import net.torvald.terrarum.modulecomputers.virtualcomputer.tvd.ByteArray64GrowableOutputStream
 import net.torvald.terrarum.weather.WeatherMixer
+import java.util.zip.GZIPOutputStream
 
 /**
  * Created by minjaesong on 2021-08-23.
@@ -34,7 +37,7 @@ open class WriteMeta(val ingame: TerrarumIngame) {
                     it.append("\n\n## module: $modname ##\n\n")
                     it.append(file.readText())
                 }
-                it.toString()
+                bytesToZipdStr(it.toString().toByteArray())
             },
 
             "items" to StringBuilder().let {
@@ -42,7 +45,7 @@ open class WriteMeta(val ingame: TerrarumIngame) {
                     it.append("\n\n## module: $modname ##\n\n")
                     it.append(file.readText())
                 }
-                it.toString()
+                bytesToZipdStr(it.toString().toByteArray())
             },
 
             "wires" to StringBuilder().let {
@@ -50,7 +53,7 @@ open class WriteMeta(val ingame: TerrarumIngame) {
                     it.append("\n\n## module: $modname ##\n\n")
                     it.append(file.readText())
                 }
-                it.toString()
+                bytesToZipdStr(it.toString().toByteArray())
             },
 
             // TODO fluids
@@ -59,7 +62,7 @@ open class WriteMeta(val ingame: TerrarumIngame) {
                     it.append("\n\n## module: $modname ##\n\n")
                     it.append(file.readText())
                 }
-                it.toString()
+                bytesToZipdStr(it.toString().toByteArray())
             },
 
             "loadorder" to ModMgr.loadOrder,
@@ -69,4 +72,33 @@ open class WriteMeta(val ingame: TerrarumIngame) {
         return Json(JsonWriter.OutputType.json).toJson(props)
     }
 
+    /**
+     * @param b a ByteArray
+     * @return Bytes in [b] which are GZip'd then Ascii85-encoded
+     */
+    private fun bytesToZipdStr(b: ByteArray): String {
+        val sb = StringBuilder()
+        val bo = ByteArray64GrowableOutputStream()
+        val zo = GZIPOutputStream(bo)
+
+        b.forEach {
+            zo.write(it.toInt())
+        }
+        zo.flush(); zo.close()
+
+        val ba = bo.toByteArray64()
+        var bai = 0
+        val buf = IntArray(4) { Ascii85.PAD_BYTE }
+        ba.forEach {
+            if (bai > 0 && bai % 4 == 0) {
+                sb.append(Ascii85.encode(buf[0], buf[1], buf[2], buf[3]))
+            }
+
+            buf[bai % 4] = it.toInt() and 255
+
+            bai += 1
+        }; sb.append(Ascii85.encode(buf[0], buf[1], buf[2], buf[3]))
+
+        return sb.toString()
+    }
 }
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/serialise/WriteWorld.kt b/src/net/torvald/terrarum/serialise/WriteWorld.kt
index 0f2626386..259ae01f6 100644
--- a/src/net/torvald/terrarum/serialise/WriteWorld.kt
+++ b/src/net/torvald/terrarum/serialise/WriteWorld.kt
@@ -17,7 +17,7 @@ class WriteWorld {
 
     /**
      * @param b a BlockLayer
-     * @return Bytes in BlockLayer, GZip'd then Ascii85-encoded
+     * @return Bytes in [b] which are GZip'd then Ascii85-encoded
      */
     private fun blockLayerToStr(b: BlockLayer): String {
         val sb = StringBuilder()