diff --git a/core/src/mindustry/content/Blocks.java b/core/src/mindustry/content/Blocks.java
index ae8f695ec0..df1dc5333e 100644
--- a/core/src/mindustry/content/Blocks.java
+++ b/core/src/mindustry/content/Blocks.java
@@ -290,6 +290,7 @@ public class Blocks{
             liquidDrop = Liquids.oil;
             isLiquid = true;
             cacheLayer = CacheLayer.tar;
+            obstructsLight = true;
         }};
 
         cryofluid = new Floor("pooled-cryofluid"){{
@@ -308,6 +309,8 @@ public class Blocks{
             emitLight = true;
             lightRadius = 25f;
             lightColor = Color.cyan.cpy().a(0.19f);
+            obstructsLight = true;
+            forceDrawLight = true;
         }};
 
         slag = new Floor("molten-slag"){{
@@ -324,6 +327,8 @@ public class Blocks{
             emitLight = true;
             lightRadius = 40f;
             lightColor = Color.orange.cpy().a(0.38f);
+            obstructsLight = true;
+            forceDrawLight = true;
         }};
 
         space = new Floor("space"){{
@@ -486,6 +491,7 @@ public class Blocks{
             drownTime = 200f;
             cacheLayer = CacheLayer.arkycite;
             albedo = 0.9f;
+            obstructsLight = true;
         }};
 
         arkyicStone = new Floor("arkyic-stone"){{
@@ -688,6 +694,7 @@ public class Blocks{
         sporeCluster = new Prop("spore-cluster"){{
             variants = 3;
             breakSound = Sounds.plantBreak;
+            obstructsLight = false;
         }};
 
         redweed = new Seaweed("redweed"){{
@@ -765,6 +772,7 @@ public class Blocks{
             variants = 3;
             customShadow = true;
             arkyicStone.asFloor().decoration = this;
+            obstructsLight = false;
         }};
 
         crystalCluster = new TallBlock("crystal-cluster"){{
diff --git a/core/src/mindustry/graphics/BlockRenderer.java b/core/src/mindustry/graphics/BlockRenderer.java
index d6aa1f544f..66a0835455 100644
--- a/core/src/mindustry/graphics/BlockRenderer.java
+++ b/core/src/mindustry/graphics/BlockRenderer.java
@@ -16,6 +16,7 @@ import mindustry.game.*;
 import mindustry.game.Teams.*;
 import mindustry.gen.*;
 import mindustry.world.*;
+import mindustry.world.blocks.environment.*;
 import mindustry.world.blocks.environment.Floor.*;
 import mindustry.world.blocks.power.*;
 
@@ -50,6 +51,7 @@ public class BlockRenderer{
 
     private BlockQuadtree blockTree = new BlockQuadtree(new Rect(0, 0, 1, 1));
     private BlockLightQuadtree blockLightTree = new BlockLightQuadtree(new Rect(0, 0, 1, 1));
+    private OverlayQuadtree overlayTree = new OverlayQuadtree(new Rect(0, 0, 1, 1));
     private FloorQuadtree floorTree = new FloorQuadtree(new Rect(0, 0, 1, 1));
 
     public BlockRenderer(){
@@ -76,13 +78,14 @@ public class BlockRenderer{
         });
 
         Events.on(TilePreChangeEvent.class, event -> {
-            if(blockTree == null || floorTree == null) return;
+            if(blockTree == null || floorTree == null || overlayTree == null) return;
 
             if(indexBlock(event.tile)){
                 blockTree.remove(event.tile);
                 blockLightTree.remove(event.tile);
             }
             if(indexFloor(event.tile)) floorTree.remove(event.tile);
+            if(indexOverlay(event.tile)) overlayTree.remove(event.tile);
         });
 
         Events.on(TileChangeEvent.class, event -> {
@@ -112,6 +115,7 @@ public class BlockRenderer{
     public void reload(){
         blockTree = new BlockQuadtree(new Rect(0, 0, world.unitWidth(), world.unitHeight()));
         blockLightTree = new BlockLightQuadtree(new Rect(0, 0, world.unitWidth(), world.unitHeight()));
+        overlayTree = new OverlayQuadtree(new Rect(0, 0, world.unitWidth(), world.unitHeight()));
         floorTree = new FloorQuadtree(new Rect(0, 0, world.unitWidth(), world.unitHeight()));
 
         shadowEvents.clear();
@@ -233,13 +237,25 @@ public class BlockRenderer{
         if(indexFloor(tile)) floorTree.insert(tile);
     }
 
+    public void removeOverlayIndex(Tile tile){
+        if(indexOverlay(tile)) overlayTree.remove(tile);
+    }
+
+    public void addOverlayIndex(Tile tile){
+        if(indexOverlay(tile)) overlayTree.insert(tile);
+    }
+
     boolean indexBlock(Tile tile){
         var block = tile.block();
         return tile.isCenter() && block != Blocks.air && block.cacheLayer == CacheLayer.normal;
     }
 
+    boolean indexOverlay(Tile tile){
+        return !tile.block().obstructsLight && tile.overlay().emitLight && world.getDarkness(tile.x, tile.y) < 3;
+    }
+
     boolean indexFloor(Tile tile){
-        return tile.block() == Blocks.air && tile.floor().emitLight && world.getDarkness(tile.x, tile.y) < 3;
+        return !tile.block().obstructsLight && tile.floor().emitLight && world.getDarkness(tile.x, tile.y) < 3;
     }
 
     void recordIndex(Tile tile){
@@ -247,6 +263,7 @@ public class BlockRenderer{
             blockTree.insert(tile);
             blockLightTree.insert(tile);
         }
+        if(indexOverlay(tile)) overlayTree.insert(tile);
         if(indexFloor(tile)) floorTree.insert(tile);
     }
 
@@ -399,6 +416,7 @@ public class BlockRenderer{
 
         //draw floor lights
         floorTree.intersect(bounds, lightview::add);
+        overlayTree.intersect(bounds, lightview::add);
 
         blockLightTree.intersect(bounds, tile -> {
             if(tile.block().emitLight && (tile.build == null || procLights.add(tile.build.pos()))){
@@ -518,8 +536,18 @@ public class BlockRenderer{
                     entity.drawLight();
                 }else if(tile.block().emitLight){
                     tile.block().drawEnvironmentLight(tile);
-                }else if(tile.floor().emitLight && tile.block() == Blocks.air){ //only draw floor light under non-solid blocks
-                    tile.floor().drawEnvironmentLight(tile);
+                }
+
+                if(!tile.block().obstructsLight){
+                    Floor floor = tile.floor();
+                    Floor overlay = tile.overlay();
+
+                    if(!floor.obstructsLight && overlay.emitLight){
+                        overlay.drawEnvironmentLight(tile);
+                    }
+                    if(floor.forceDrawLight || (!overlay.obstructsLight && floor.emitLight)){
+                        floor.drawEnvironmentLight(tile);
+                    }
                 }
             }
         }
@@ -588,6 +616,23 @@ public class BlockRenderer{
         }
     }
 
+    static class OverlayQuadtree extends QuadTree<Tile>{
+        public OverlayQuadtree(Rect bounds){
+            super(bounds);
+        }
+
+        @Override
+        public void hitbox(Tile tile){
+            var overlay = tile.overlay();
+            tmp.setCentered(tile.worldx(), tile.worldy(), overlay.lightClipSize, overlay.lightClipSize);
+        }
+
+        @Override
+        protected QuadTree<Tile> newChild(Rect rect){
+            return new OverlayQuadtree(rect);
+        }
+    }
+
     static class FloorQuadtree extends QuadTree<Tile>{
 
         public FloorQuadtree(Rect bounds){
diff --git a/core/src/mindustry/input/InputHandler.java b/core/src/mindustry/input/InputHandler.java
index adc6cd541f..2df087acf0 100644
--- a/core/src/mindustry/input/InputHandler.java
+++ b/core/src/mindustry/input/InputHandler.java
@@ -197,12 +197,62 @@ public abstract class InputHandler implements InputProcessor, GestureListener{
         build.items.set(item, amount);
     }
 
+    @Remote(called = Loc.server, unreliable = true)
+    public static void setItems(Building build, ItemStack[] items){
+        if(build == null || build.items == null) return;
+
+        for(ItemStack stack : items){
+            build.items.set(stack.item, stack.amount);
+        }
+    }
+
+    @Remote(called = Loc.server, unreliable = true)
+    public static void setTileItems(Item item, int amount, int[] positions){
+        for(int pos : positions){
+            Building build = world.build(pos);
+            if(build != null && build.items != null){
+                build.items.set(item, amount);
+            }
+        }
+    }
+
     @Remote(called = Loc.server, unreliable = true)
     public static void clearItems(Building build){
         if(build == null || build.items == null) return;
         build.items.clear();
     }
 
+    @Remote(called = Loc.server, unreliable = true)
+    public static void setLiquid(Building build, Liquid liquid, float amount){
+        if(build == null || build.liquids == null) return;
+        build.liquids.set(liquid, amount);
+    }
+
+    @Remote(called = Loc.server, unreliable = true)
+    public static void setLiquids(Building build, LiquidStack[] liquids){
+        if(build == null || build.liquids == null) return;
+
+        for(LiquidStack stack : liquids){
+            build.liquids.set(stack.liquid, stack.amount);
+        }
+    }
+
+    @Remote(called = Loc.server, unreliable = true)
+    public static void setTileLiquids(Liquid liquid, float amount, int[] positions){
+        for(int pos : positions){
+            Building build = world.build(pos);
+            if(build != null && build.liquids != null){
+                build.liquids.set(liquid, amount);
+            }
+        }
+    }
+
+    @Remote(called = Loc.server, unreliable = true)
+    public static void clearLiquids(Building build){
+        if(build == null || build.liquids == null) return;
+        build.liquids.clear();
+    }
+
     @Remote(called = Loc.server, unreliable = true)
     public static void transferItemTo(@Nullable Unit unit, Item item, int amount, float x, float y, Building build){
         if(build == null || build.items == null || item == null) return;
diff --git a/core/src/mindustry/io/SaveVersion.java b/core/src/mindustry/io/SaveVersion.java
index 6973da00fc..7f327661ae 100644
--- a/core/src/mindustry/io/SaveVersion.java
+++ b/core/src/mindustry/io/SaveVersion.java
@@ -334,6 +334,7 @@ public abstract class SaveVersion extends SaveFileReader{
                 //set block only if this is the center; otherwise, it's handled elsewhere
                 if(isCenter){
                     tile.setBlock(block);
+                    if(tile.build != null) tile.build.enabled = true;
                 }
 
                 //must be assigned after setBlock, because that can reset data
diff --git a/core/src/mindustry/io/TypeIO.java b/core/src/mindustry/io/TypeIO.java
index 2ffcf008db..c0b1b753d1 100644
--- a/core/src/mindustry/io/TypeIO.java
+++ b/core/src/mindustry/io/TypeIO.java
@@ -829,6 +829,39 @@ public class TypeIO{
         return new ItemStack(readItem(read), read.i());
     }
 
+    public static void writeItemStacks(Writes write, ItemStack[] stacks){
+        write.s(stacks.length);
+        for(ItemStack stack : stacks){
+            writeItems(write, stack);
+        }
+    }
+
+    public static ItemStack[] readItemStacks(Reads read){
+        short count = read.s();
+        ItemStack[] stacks = new ItemStack[count];
+        for(int i = 0; i < count; i++)
+            stacks[i] = readItems(read);
+        return stacks;
+    }
+
+    public static void writeLiquidStacks(Writes write, LiquidStack[] stacks){
+        write.s(stacks.length);
+        for(LiquidStack stack : stacks){
+            writeLiquid(write, stack.liquid);
+            write.f(stack.amount);
+        }
+    }
+
+    public static LiquidStack[] readLiquidStacks(Reads read){
+        short count = read.s();
+        LiquidStack[] stacks = new LiquidStack[count];
+        for(int i = 0; i < count; i++){
+            Liquid liquid = readLiquid(read);
+            stacks[i] = new LiquidStack(liquid, read.f());
+        }
+        return stacks;
+    }
+
     public static void writeTeam(Writes write, Team team){
         write.b(team == null ? 0 : team.id);
     }
diff --git a/core/src/mindustry/io/versions/LegacySaveVersion.java b/core/src/mindustry/io/versions/LegacySaveVersion.java
index ef01f750a9..152aa8cde0 100644
--- a/core/src/mindustry/io/versions/LegacySaveVersion.java
+++ b/core/src/mindustry/io/versions/LegacySaveVersion.java
@@ -56,6 +56,7 @@ public abstract class LegacySaveVersion extends LegacyRegionSaveVersion{
                 //do not override occupied cells
                 if(!occupied){
                     tile.setBlock(block);
+                    if(tile.build != null) tile.build.enabled = true;
                 }
 
                 if(block.hasBuilding()){
diff --git a/core/src/mindustry/io/versions/ShortChunkSaveVersion.java b/core/src/mindustry/io/versions/ShortChunkSaveVersion.java
index ce1300a622..7a1e1630e4 100644
--- a/core/src/mindustry/io/versions/ShortChunkSaveVersion.java
+++ b/core/src/mindustry/io/versions/ShortChunkSaveVersion.java
@@ -101,6 +101,7 @@ public class ShortChunkSaveVersion extends SaveVersion{
                 //set block only if this is the center; otherwise, it's handled elsewhere
                 if(isCenter){
                     tile.setBlock(block);
+                    if(tile.build != null) tile.build.enabled = true;
                 }
 
                 //must be assigned after setBlock, because that can reset data
diff --git a/core/src/mindustry/world/Block.java b/core/src/mindustry/world/Block.java
index 9bd181732a..87e68b7471 100644
--- a/core/src/mindustry/world/Block.java
+++ b/core/src/mindustry/world/Block.java
@@ -321,6 +321,8 @@ public class Block extends UnlockableContent implements Senseable{
     public Color lightColor = Color.white.cpy();
     /** If true, drawLight() will be called for this block. */
     public boolean emitLight = false;
+    /** If true, this block obstructs light emitted by other blocks. */
+    public boolean obstructsLight = true;
     /** Radius of the light emitted by this block. */
     public float lightRadius = 60f;
 
diff --git a/core/src/mindustry/world/blocks/defense/ForceProjector.java b/core/src/mindustry/world/blocks/defense/ForceProjector.java
index c4e846fe1e..37111fd26e 100644
--- a/core/src/mindustry/world/blocks/defense/ForceProjector.java
+++ b/core/src/mindustry/world/blocks/defense/ForceProjector.java
@@ -125,7 +125,7 @@ public class ForceProjector extends Block{
                             float liquidHeat = (1f + (liquid.heatCapacity - 0.4f) * 0.9f);
                             float regenBoost = ((cooldownNormal * (cooldownLiquid * liquidHeat)) - cooldownNormal) * 60f;
                             float cooldownBoost = (shieldHealth / (cooldownBrokenBase * (cooldownLiquid * liquidHeat)) - shieldHealth / cooldownBrokenBase) / 60f;
-                                
+
                             b.table(bt -> {
                                 bt.right().defaults().padRight(3).left();
                                 bt.add("[lightgray]+" + Core.bundle.format("bar.regenerationrate", Strings.autoFixed(regenBoost, 2))).pad(5).row();
@@ -156,6 +156,15 @@ public class ForceProjector extends Block{
         public boolean broken = true;
         public float buildup, radscl, hit, warmup, phaseHeat;
 
+        @Override
+        public void setProp(LAccess prop, double value){
+            if(prop == LAccess.shield){
+                buildup = Math.max(shieldHealth + phaseShieldBoost * phaseHeat - (float)value, 0f);
+            }else{
+                super.setProp(prop, value);
+            }
+        }
+
         @Override
         public float range(){
             return realRadius();
diff --git a/core/src/mindustry/world/blocks/environment/Floor.java b/core/src/mindustry/world/blocks/environment/Floor.java
index dbd97cafe7..269728b9e2 100644
--- a/core/src/mindustry/world/blocks/environment/Floor.java
+++ b/core/src/mindustry/world/blocks/environment/Floor.java
@@ -68,6 +68,8 @@ public class Floor extends Block{
     public Block decoration = Blocks.air;
     /** Whether units can draw shadows over this. */
     public boolean canShadow = true;
+    /** If true, this floor ignores the obstructsLight flag of overlays. */
+    public boolean forceDrawLight = false;
     /** Whether this overlay needs a surface to be on. False for floating blocks, like spawns. */
     public boolean needsSurface = true;
     /** If true, cores can be placed on this floor. */
@@ -110,6 +112,7 @@ public class Floor extends Block{
         allowRectanglePlacement = true;
         instantBuild = true;
         ignoreBuildDarkness = true;
+        obstructsLight = false;
         placeEffect = Fx.rotateBlock;
     }
 
diff --git a/core/src/mindustry/world/blocks/environment/SeaBush.java b/core/src/mindustry/world/blocks/environment/SeaBush.java
index 81c0c5fe58..f5c71f29e7 100644
--- a/core/src/mindustry/world/blocks/environment/SeaBush.java
+++ b/core/src/mindustry/world/blocks/environment/SeaBush.java
@@ -19,6 +19,7 @@ public class SeaBush extends Prop{
     public SeaBush(String name){
         super(name);
         variants = 0;
+        obstructsLight = false;
     }
 
     @Override
diff --git a/core/src/mindustry/world/blocks/environment/Seaweed.java b/core/src/mindustry/world/blocks/environment/Seaweed.java
index bc1c852f90..bfaad6fa01 100644
--- a/core/src/mindustry/world/blocks/environment/Seaweed.java
+++ b/core/src/mindustry/world/blocks/environment/Seaweed.java
@@ -9,6 +9,8 @@ public class Seaweed extends Prop{
 
     public Seaweed(String name){
         super(name);
+
+        obstructsLight = false;
     }
 
     @Override
diff --git a/core/src/mindustry/world/blocks/logic/CanvasBlock.java b/core/src/mindustry/world/blocks/logic/CanvasBlock.java
index 566704d6e4..7aee2477e8 100644
--- a/core/src/mindustry/world/blocks/logic/CanvasBlock.java
+++ b/core/src/mindustry/world/blocks/logic/CanvasBlock.java
@@ -68,6 +68,8 @@ public class CanvasBlock extends Block{
         clipSize = Math.max(clipSize, size * 8 - padding);
 
         previewPixmap = new Pixmap(canvasSize, canvasSize);
+
+        if(!Mathf.isPowerOfTwo(palette.length)) throw new RuntimeException("Non power-of-two palettes for canvas blocks are not supported.");
     }
 
     @Override
@@ -150,7 +152,7 @@ public class CanvasBlock extends Block{
         public @Nullable Texture texture;
         public byte[] data = new byte[Mathf.ceil(canvasSize * canvasSize * bitsPerPixel / 8f)];
         public int blending;
-        
+
         protected boolean updated = false;
 
         public void setPixel(int pos, int index){
@@ -286,7 +288,7 @@ public class CanvasBlock extends Block{
                 }
             }
         }
-        
+
         @Override
         public double sense(LAccess sensor){
             return switch(sensor){
@@ -314,12 +316,12 @@ public class CanvasBlock extends Block{
                 int[] curColor = {palette[0]};
                 boolean[] modified = {false};
                 boolean[] fill = {false};
-                
+
                 dialog.hidden(() -> {
                     texture.dispose();
                     pix.dispose();
                 });
-                
+
                 dialog.resized(dialog::hide);
 
                 dialog.cont.table(Tex.pane, body -> {
diff --git a/desktop/src/mindustry/desktop/DesktopLauncher.java b/desktop/src/mindustry/desktop/DesktopLauncher.java
index e20a4208c4..72a73a00fa 100644
--- a/desktop/src/mindustry/desktop/DesktopLauncher.java
+++ b/desktop/src/mindustry/desktop/DesktopLauncher.java
@@ -118,17 +118,19 @@ public class DesktopLauncher extends ClientLauncher{
         testMobile = Seq.with(args).contains("-testMobile");
 
         if(useDiscord){
-            try{
-                DiscordRPC.connect(discordID);
-                Log.info("Initialized Discord rich presence.");
-                Runtime.getRuntime().addShutdownHook(new Thread(DiscordRPC::close));
-            }catch(NoDiscordClientException none){
-                //don't log if no client is found
-                useDiscord = false;
-            }catch(Throwable t){
-                useDiscord = false;
-                Log.warn("Failed to initialize Discord RPC - you are likely using a JVM <16.");
-            }
+            Threads.daemon(() -> {
+                try{
+                    DiscordRPC.connect(discordID);
+                    Log.info("Initialized Discord rich presence.");
+                    Runtime.getRuntime().addShutdownHook(new Thread(DiscordRPC::close));
+                }catch(NoDiscordClientException none){
+                    //don't log if no client is found
+                    useDiscord = false;
+                }catch(Throwable t){
+                    useDiscord = false;
+                    Log.warn("Failed to initialize Discord RPC - you are likely using a JVM <16.");
+                }
+            });
         }
 
         if(useSteam){
diff --git a/gradle.properties b/gradle.properties
index 75a9789f5a..b368b24836 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -26,4 +26,4 @@ org.gradle.caching=true
 org.gradle.internal.http.socketTimeout=100000
 org.gradle.internal.http.connectionTimeout=100000
 android.enableR8.fullMode=false
-archash=9b4648505a
+archash=65d654d634