Fixed #2722

core/src/mindustry/content/Blocks.java

@@ -208,6 +208,7 @@ public class Blocks implements ContentList{
             liquidDrop = Liquids.slag;
             isLiquid = true;
             cacheLayer = CacheLayer.slag;
+            attributes.set(Attribute.heat, 0.85f);
         }};
 
         stone = new Floor("stone");
@@ -1142,6 +1143,7 @@ public class Blocks implements ContentList{
             powerProduction = 1.8f;
             generateEffect = Fx.redgeneratespark;
             size = 2;
+            floating = true;
         }};
 
         steamGenerator = new BurnerGenerator("steam-generator"){{

core/src/mindustry/content/UnitTypes.java

@@ -935,7 +935,7 @@ public class UnitTypes implements ContentList{
             drag = 0.016f;
             flying = true;
             range = 140f;
-            hitSize = 18f;
+            hitSize = 20f;
             lowAltitude = true;
             armor = 5f;
 

core/src/mindustry/world/blocks/power/ThermalGenerator.java

@@ -22,7 +22,7 @@ public class ThermalGenerator extends PowerGenerator{
     public void setStats(){
         super.setStats();
 
-        stats.add(BlockStat.tiles, attribute);
+        stats.add(BlockStat.tiles, attribute, floating);
     }
 
     @Override

core/src/mindustry/world/blocks/units/UnitFactory.java

@@ -130,7 +130,7 @@ public class UnitFactory extends UnitBlock{
             Seq<UnitType> units = Seq.with(plans).map(u -> u.unit).filter(u -> u.unlockedNow());
 
             if(units.any()){
-                ItemSelection.buildTable(table, units, () -> currentPlan == -1 ? null : plans[currentPlan].unit, unit -> configure(units.indexOf(unit)));
+                ItemSelection.buildTable(table, units, () -> currentPlan == -1 ? null : plans[currentPlan].unit, unit -> configure(Structs.indexOf(plans, u -> u.unit == unit)));
             }else{
                 table.table(Styles.black3, t -> t.add("@none").color(Color.lightGray));
             }

core/src/mindustry/world/meta/BlockStats.java

@@ -38,12 +38,20 @@ public class BlockStats{
     }
 
     public void add(BlockStat stat, Attribute attr){
-        add(stat, attr, 1f);
+        add(stat, attr, false, 1f);
     }
 
     public void add(BlockStat stat, Attribute attr, float scale){
+        add(stat, attr, false, scale);
+    }
+
+    public void add(BlockStat stat, Attribute attr, boolean floating){
+        add(stat, attr, floating, 1f);
+    }
+
+    public void add(BlockStat stat, Attribute attr, boolean floating, float scale){
         for(Block block : Vars.content.blocks()){
-            if(!block.isFloor() || block.asFloor().attributes.get(attr) == 0) continue;
+            if(!block.isFloor() || block.asFloor().attributes.get(attr) == 0 || (block.asFloor().isLiquid && !floating)) continue;
             add(stat, new FloorEfficiencyValue(block.asFloor(), block.asFloor().attributes.get(attr) * scale));
         }
     }