diff --git a/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/commands/ChunkExportLoaderCommand.kt b/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/commands/ChunkExportLoaderCommand.kt
index 62479b7..0a0527f 100644
--- a/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/commands/ChunkExportLoaderCommand.kt
+++ b/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/commands/ChunkExportLoaderCommand.kt
@@ -2,8 +2,8 @@ package cloud.kubelet.foundation.gjallarhorn.commands
 
 import cloud.kubelet.foundation.gjallarhorn.export.ChunkExportLoader
 import cloud.kubelet.foundation.gjallarhorn.state.BlockExpanse
+import cloud.kubelet.foundation.gjallarhorn.state.BlockLogTracker
 import cloud.kubelet.foundation.gjallarhorn.state.ChangelogSlice
-import cloud.kubelet.foundation.gjallarhorn.state.SparseBlockStateMap
 import cloud.kubelet.foundation.gjallarhorn.util.savePngFile
 import com.github.ajalt.clikt.core.CliktCommand
 import com.github.ajalt.clikt.core.requireObject
@@ -22,12 +22,12 @@ class ChunkExportLoaderCommand : CliktCommand("Chunk Export Loader", name = "chu
   private val render by option("--render", help = "Render Top Down Image").enum<ImageRenderType> { it.id }
 
   override fun run() {
-    val map = SparseBlockStateMap()
-    val loader = ChunkExportLoader(map)
+    val tracker = BlockLogTracker(isConcurrent = true)
+    val loader = ChunkExportLoader(tracker = tracker)
     loader.loadAllChunksForWorld(exportDirectoryPath, world, fast = true)
     if (render != null) {
-      val expanse = BlockExpanse.offsetAndMax(map.calculateZeroBlockOffset(), map.calculateMaxBlock())
-      map.applyCoordinateOffset(expanse.offset)
+      val expanse = BlockExpanse.zeroOffsetAndMax(tracker.calculateZeroBlockOffset(), tracker.calculateMaxBlock())
+      val map = tracker.buildBlockMap(expanse.offset)
       val renderer = render!!.create(expanse, db)
       val image = renderer.render(ChangelogSlice.none, map)
       image.savePngFile("full.png")
diff --git a/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/export/ChunkExportLoader.kt b/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/export/ChunkExportLoader.kt
index 4fc2659..2b60460 100644
--- a/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/export/ChunkExportLoader.kt
+++ b/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/export/ChunkExportLoader.kt
@@ -1,6 +1,7 @@
 package cloud.kubelet.foundation.gjallarhorn.export
 
 import cloud.kubelet.foundation.gjallarhorn.state.BlockCoordinate
+import cloud.kubelet.foundation.gjallarhorn.state.BlockLogTracker
 import cloud.kubelet.foundation.gjallarhorn.state.BlockState
 import cloud.kubelet.foundation.gjallarhorn.state.SparseBlockStateMap
 import cloud.kubelet.foundation.heimdall.export.ExportedChunk
@@ -12,7 +13,7 @@ import java.util.zip.GZIPInputStream
 import kotlin.io.path.inputStream
 import kotlin.io.path.listDirectoryEntries
 
-class ChunkExportLoader(val map: SparseBlockStateMap) {
+class ChunkExportLoader(val map: SparseBlockStateMap? = null, val tracker: BlockLogTracker? = null) {
   fun loadAllChunksForWorld(path: Path, world: String, fast: Boolean = false) {
     val chunkFiles = path.listDirectoryEntries("${world}_chunk_*.json.gz")
     if (fast) {
@@ -30,6 +31,7 @@ class ChunkExportLoader(val map: SparseBlockStateMap) {
     val chunk = Json.decodeFromStream(ExportedChunk.serializer(), gzipInputStream)
 
     var blockCount = 0L
+    val allBlocks = if (tracker != null) mutableMapOf<BlockCoordinate, BlockState>() else null
     for (section in chunk.sections) {
       val x = (chunk.x * 16) + section.x
       val z = (chunk.z * 16) + section.z
@@ -40,10 +42,18 @@ class ChunkExportLoader(val map: SparseBlockStateMap) {
 
         val coordinate = BlockCoordinate(x.toLong(), y.toLong(), z.toLong())
         val state = BlockState.cached(block.type)
-        map.put(coordinate, state)
+        map?.put(coordinate, state)
+        if (allBlocks != null) {
+          allBlocks[coordinate] = state
+        }
         blockCount++
       }
     }
+
+    if (allBlocks != null) {
+      tracker?.placeAll(allBlocks)
+    }
+
     logger.info("($id) Chunk X=${chunk.x} Z=${chunk.z} had $blockCount blocks")
   }
 
diff --git a/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockCoordinateSparseMap.kt b/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockCoordinateSparseMap.kt
index 5a48337..c4b353b 100644
--- a/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockCoordinateSparseMap.kt
+++ b/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockCoordinateSparseMap.kt
@@ -57,8 +57,8 @@ open class BlockCoordinateSparseMap<T> : BlockCoordinateStore<T> {
       val zSectionMap = TreeMap<Long, TreeMap<Long, T>>()
       (xSection.key + offset.x) to xSection.value.map { zSection ->
         val ySectionMap = TreeMap<Long, T>()
-        (zSection.key + offset.z) to zSection.value.map { ySection ->
-          (ySection.key + offset.y) to ySection.value
+        (zSection.key + offset.z) to zSection.value.mapKeys {
+          (it.key + offset.y)
         }.toMap(ySectionMap)
       }.toMap(zSectionMap)
     }.toMap(root)
diff --git a/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockExpanse.kt b/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockExpanse.kt
index b2fa0a4..c1b0a17 100644
--- a/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockExpanse.kt
+++ b/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockExpanse.kt
@@ -5,7 +5,7 @@ class BlockExpanse(
   val size: BlockCoordinate
 ) {
   companion object {
-    fun offsetAndMax(offset: BlockCoordinate, max: BlockCoordinate) = BlockExpanse(
+    fun zeroOffsetAndMax(offset: BlockCoordinate, max: BlockCoordinate) = BlockExpanse(
       offset,
       offset.applyAsOffset(max)
     )
diff --git a/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockLogTracker.kt b/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockLogTracker.kt
index d5f3b4f..c1a8437 100644
--- a/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockLogTracker.kt
+++ b/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockLogTracker.kt
@@ -10,6 +10,10 @@ class BlockLogTracker(private val mode: BlockTrackMode = BlockTrackMode.RemoveOn
     blocks[position] = state
   }
 
+  fun placeAll(map: Map<BlockCoordinate, BlockState>) {
+    blocks.putAll(map)
+  }
+
   fun delete(position: BlockCoordinate) {
     if (mode == BlockTrackMode.AirOnDelete) {
       blocks[position] = BlockState.AirBlock
diff --git a/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockMapTimelapse.kt b/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockMapTimelapse.kt
index 262f9c0..a39cbb8 100644
--- a/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockMapTimelapse.kt
+++ b/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockMapTimelapse.kt
@@ -17,7 +17,7 @@ class BlockMapTimelapse<T> :
     val globalBlockOffset = BlockCoordinate.maxOf(allBlockOffsets)
     val allBlockMaxes = trackers.map { it.value.calculateMaxBlock() }
     val globalBlockMax = BlockCoordinate.maxOf(allBlockMaxes)
-    val globalBlockExpanse = BlockExpanse.offsetAndMax(globalBlockOffset, globalBlockMax)
+    val globalBlockExpanse = BlockExpanse.zeroOffsetAndMax(globalBlockOffset, globalBlockMax)
 
     val renderer = pool.createRendererFunction(globalBlockExpanse)
     for ((slice, tracker) in trackers) {