diff --git a/src/net/torvald/terrarum/gameworld/BlockLayer.kt b/src/net/torvald/terrarum/gameworld/BlockLayer.kt
index fdca503c7..a1c109204 100644
--- a/src/net/torvald/terrarum/gameworld/BlockLayer.kt
+++ b/src/net/torvald/terrarum/gameworld/BlockLayer.kt
@@ -5,7 +5,10 @@ import net.torvald.terrarum.AppLoader.printdbg
 import sun.misc.Unsafe
 
 /**
- * Created by minjaesong on 2016-01-17.
+ * Original version Created by minjaesong on 2016-01-17.
+ * Unsafe version Created by minjaesong on 2019-06-08.
+ *
+ * Note to self: refrain from using shorts--just do away with two bytes: different system have different endianness
  */
 open class BlockLayer(val width: Int, val height: Int) : Disposable {
 
diff --git a/src/net/torvald/terrarum/worlddrawer/LightmapRendererNew.kt b/src/net/torvald/terrarum/worlddrawer/LightmapRendererNew.kt
index 5ffc266d1..4a3d8c1d8 100644
--- a/src/net/torvald/terrarum/worlddrawer/LightmapRendererNew.kt
+++ b/src/net/torvald/terrarum/worlddrawer/LightmapRendererNew.kt
@@ -147,6 +147,7 @@ object LightmapRenderer {
             val ypos = y - for_y_start + overscan_open
             val xpos = x - for_x_start + overscan_open
 
+            // TODO as you can see above, we're already doing a boundary check; try using unsafe here?
             return lightmap[ypos][xpos]
             //return lightmap[ypos * LIGHTMAP_WIDTH + xpos]
         }
@@ -174,6 +175,7 @@ object LightmapRenderer {
             val ypos = y - for_y_start + overscan_open
             val xpos = x - for_x_start + overscan_open
 
+            // TODO as you can see above, we're already doing a boundary check; try using unsafe here?
             lightmap[ypos][xpos] = applyFun.invoke(list[ypos][xpos], colour)
             //list[ypos * LIGHTMAP_WIDTH + xpos] = applyFun.invoke(list[ypos * LIGHTMAP_WIDTH + xpos], colour)
         }