diff --git a/core/assets/sprites/block_colors.png b/core/assets/sprites/block_colors.png
index 6649c27445..1e888528da 100644
Binary files a/core/assets/sprites/block_colors.png and b/core/assets/sprites/block_colors.png differ
diff --git a/core/assets/sprites/sprites2.png b/core/assets/sprites/sprites2.png
index 11661f6d1d..bae1868cc6 100644
Binary files a/core/assets/sprites/sprites2.png and b/core/assets/sprites/sprites2.png differ
diff --git a/core/src/mindustry/content/Blocks.java b/core/src/mindustry/content/Blocks.java
index 302ba2dc3c..464b613680 100644
--- a/core/src/mindustry/content/Blocks.java
+++ b/core/src/mindustry/content/Blocks.java
@@ -159,6 +159,24 @@ public class Blocks implements ContentList{
             albedo = 0.5f;
         }};
 
+        darksandTaintedWater = new ShallowLiquid("darksand-tainted-water"){{
+            speedMultiplier = 0.75f;
+            statusDuration = 60f;
+            albedo = 0.5f;
+        }};
+
+        sandWater = new ShallowLiquid("sand-water"){{
+            speedMultiplier = 0.8f;
+            statusDuration = 50f;
+            albedo = 0.5f;
+        }};
+
+        darksandWater = new ShallowLiquid("darksand-water"){{
+            speedMultiplier = 0.8f;
+            statusDuration = 50f;
+            albedo = 0.5f;
+        }};
+
         tar = new Floor("tar"){{
             drownTime = 150f;
             status = StatusEffects.tarred;
@@ -221,23 +239,9 @@ public class Blocks implements ContentList{
             playerUnmineable = true;
         }};
 
-        darksandTaintedWater = new ShallowLiquid("darksand-tainted-water", Blocks.taintedWater, Blocks.darksand){{
-            speedMultiplier = 0.75f;
-            statusDuration = 60f;
-            albedo = 0.5f;
-        }};
-
-        sandWater = new ShallowLiquid("sand-water", Blocks.water, Blocks.sand){{
-            speedMultiplier = 0.8f;
-            statusDuration = 50f;
-            albedo = 0.5f;
-        }};
-
-        darksandWater = new ShallowLiquid("darksand-water", Blocks.water, Blocks.darksand){{
-            speedMultiplier = 0.8f;
-            statusDuration = 50f;
-            albedo = 0.5f;
-        }};
+        ((ShallowLiquid)darksandTaintedWater).set(Blocks.taintedWater, Blocks.darksand);
+        ((ShallowLiquid)sandWater).set(Blocks.water, Blocks.sand);
+        ((ShallowLiquid)darksandWater).set(Blocks.water, Blocks.darksand);
 
         holostone = new Floor("holostone"){{
 
diff --git a/core/src/mindustry/type/UnitType.java b/core/src/mindustry/type/UnitType.java
index 4cf01c7307..a5a8de4cc2 100644
--- a/core/src/mindustry/type/UnitType.java
+++ b/core/src/mindustry/type/UnitType.java
@@ -59,7 +59,9 @@ public class UnitType extends UnlockableContent{
         if(EntityMapping.map(name) != null){
             constructor = EntityMapping.map(name);
         }else{
-            constructor = () -> Nulls.unit;
+            //TODO fix for mods
+            throw new RuntimeException("Unit has no type: " + name);
+            //constructor = () -> Nulls.unit;
         }
     }
 
diff --git a/core/src/mindustry/world/blocks/environment/Floor.java b/core/src/mindustry/world/blocks/environment/Floor.java
index 0d6c49528c..d3b3929975 100644
--- a/core/src/mindustry/world/blocks/environment/Floor.java
+++ b/core/src/mindustry/world/blocks/environment/Floor.java
@@ -231,14 +231,7 @@ public class Floor extends Block{
     }
 
     protected boolean doEdge(Floor other, boolean sameLayer){
-        //TODO this is awful and should not exist.
-        boolean normal = ((other instanceof ShallowLiquid) == (this instanceof ShallowLiquid)) || (cacheLayer == other.cacheLayer);
-        return (((other.blendGroup.id > blendGroup.id) || edges() == null) &&
-            other.edgeOnto(this) && (other.cacheLayer.ordinal() > this.cacheLayer.ordinal() || !sameLayer)) == normal;
-    }
-
-    protected boolean edgeOnto(Floor other){
-        return true;
+        return (((other.blendGroup.id > blendGroup.id) || edges() == null) && (other.cacheLayer.ordinal() > this.cacheLayer.ordinal() || !sameLayer));
     }
 
     TextureRegion edge(Floor block, int x, int y){
diff --git a/core/src/mindustry/world/blocks/environment/ShallowLiquid.java b/core/src/mindustry/world/blocks/environment/ShallowLiquid.java
index 4c9c4c4636..28d94c05fe 100644
--- a/core/src/mindustry/world/blocks/environment/ShallowLiquid.java
+++ b/core/src/mindustry/world/blocks/environment/ShallowLiquid.java
@@ -4,12 +4,14 @@ import mindustry.world.*;
 
 //do not use in mods!
 public class ShallowLiquid extends Floor{
-    public final Floor liquidBase, floorBase;
+    public Floor liquidBase, floorBase;
     public float liquidOpacity = 0.35f;
 
-    public ShallowLiquid(String name, Block liquid, Block floor){
+    public ShallowLiquid(String name){
         super(name);
+    }
 
+    public void set(Block liquid, Block floor){
         this.liquidBase = liquid.asFloor();
         this.floorBase = floor.asFloor();