diff --git a/core/src/mindustry/content/Blocks.java b/core/src/mindustry/content/Blocks.java
index 80ce096bc6..82d3ab071f 100644
--- a/core/src/mindustry/content/Blocks.java
+++ b/core/src/mindustry/content/Blocks.java
@@ -2449,10 +2449,9 @@ public class Blocks{
             researchCost = with(Items.beryllium, 15);
         }};
 
-        //TODO rename
         chemicalCombustionChamber = new ConsumeGenerator("chemical-combustion-chamber"){{
             requirements(Category.power, with(Items.graphite, 40, Items.tungsten, 40, Items.oxide, 40f, Items.silicon, 30));
-            powerProduction = 9f;
+            powerProduction = 8f;
             consumeLiquids(LiquidStack.with(Liquids.ozone, 2f / 60f, Liquids.arkycite, 40f / 60f));
             size = 3;
             drawer = new DrawMulti(new DrawRegion("-bottom"), new DrawPistons(){{
diff --git a/core/src/mindustry/graphics/Layer.java b/core/src/mindustry/graphics/Layer.java
index d87ef9f185..7d8d9f343a 100644
--- a/core/src/mindustry/graphics/Layer.java
+++ b/core/src/mindustry/graphics/Layer.java
@@ -35,6 +35,9 @@ public class Layer{
     //informal layer used for additive blending overlay, grouped together to reduce draw calls
     blockAdditive = 31,
 
+    //props such as boulders
+    blockProp = 32,
+
     //things drawn over blocks (intermediate layer)
     blockOver = 35,
 
@@ -83,7 +86,7 @@ public class Layer{
     //shield effects
     shields = 125,
 
-    //weather effects, e.g. rain and snow TODO draw before overlay UI?
+    //weather effects, e.g. rain and snow
     weather = 130,
 
     //light rendering *shaders used*
diff --git a/core/src/mindustry/net/NetworkIO.java b/core/src/mindustry/net/NetworkIO.java
index 87f420f63a..c6b2ce1478 100644
--- a/core/src/mindustry/net/NetworkIO.java
+++ b/core/src/mindustry/net/NetworkIO.java
@@ -44,10 +44,8 @@ public class NetworkIO{
             stream.writeLong(GlobalVars.rand.seed0);
             stream.writeLong(GlobalVars.rand.seed1);
 
-            Writes write = new Writes(stream);
-
             stream.writeInt(player.id);
-            player.write(write);
+            player.write(new Writes(stream));
 
             SaveIO.getSaveWriter().writeContentHeader(stream);
             SaveIO.getSaveWriter().writeMap(stream);
diff --git a/core/src/mindustry/world/blocks/environment/Prop.java b/core/src/mindustry/world/blocks/environment/Prop.java
index 0e7807acdd..1564ee6795 100644
--- a/core/src/mindustry/world/blocks/environment/Prop.java
+++ b/core/src/mindustry/world/blocks/environment/Prop.java
@@ -5,9 +5,11 @@ import arc.graphics.g2d.*;
 import arc.math.*;
 import mindustry.content.*;
 import mindustry.gen.*;
+import mindustry.graphics.*;
 import mindustry.world.*;
 
 public class Prop extends Block{
+    public float layer = Layer.blockProp;
 
     public Prop(String name){
         super(name);
@@ -20,6 +22,7 @@ public class Prop extends Block{
 
     @Override
     public void drawBase(Tile tile){
+        Draw.z(layer);
         Draw.rect(variants > 0 ? variantRegions[Mathf.randomSeed(tile.pos(), 0, Math.max(0, variantRegions.length - 1))] : region, tile.worldx(), tile.worldy());
     }