diff --git a/docs/scarpet/Full.md b/docs/scarpet/Full.md
index dba29bf2..e73d99ad 100644
--- a/docs/scarpet/Full.md
+++ b/docs/scarpet/Full.md
@@ -1690,9 +1690,10 @@ If type is `null`, POI at position is removed. In any case, previous POI is also
 Interestingly, `unemployed`, and `nitwit` are not used in the game, meaning, they could be used as permanent spatial 
 markers for scarpet apps. `meeting` is the only one with increased max occupancy of 32.
 
-### `set_biome(pos, biome_name)`
+### `set_biome(pos, biome_name, update=true)`
 
-Changes the biome at that block position.
+Changes the biome at that block position. if update is specified and false, then chunk will not be refreshed
+on the clients. Biome changes can only be send to clients with the entire data from the chunk.
 
 ### `update(pos)`
 
@@ -2249,6 +2250,10 @@ Feature list:
 *   `twisting_vines` (1.16)
 *   `basalt_pillar` (1.16)
 
+### `reload_chunk(pos)`
+
+Sends full chunk data to clients. Useful when lots stuff happened and you want to refresh it on the clients.
+
 ### `reset_chunk(pos)`, `reset_chunk(from_pos, to_pos)`, `reset_chunk(l(pos, ...))`
 Removes and resets the chunk, all chunks in the specified area or all chunks in a list at once, removing all previous
 blocks and entities, and replacing it with a new generation. For all currently loaded chunks, they will be brought
diff --git a/docs/scarpet/api/BlocksAndWorldAccess.md b/docs/scarpet/api/BlocksAndWorldAccess.md
index 9750cf1a..17f16470 100644
--- a/docs/scarpet/api/BlocksAndWorldAccess.md
+++ b/docs/scarpet/api/BlocksAndWorldAccess.md
@@ -134,9 +134,10 @@ If type is `null`, POI at position is removed. In any case, previous POI is also
 Interestingly, `unemployed`, and `nitwit` are not used in the game, meaning, they could be used as permanent spatial 
 markers for scarpet apps. `meeting` is the only one with increased max occupancy of 32.
 
-### `set_biome(pos, biome_name)`
+### `set_biome(pos, biome_name, update=true)`
 
-Changes the biome at that block position.
+Changes the biome at that block position. if update is specified and false, then chunk will not be refreshed
+on the clients. Biome changes can only be send to clients with the entire data from the chunk.
 
 ### `update(pos)`
 
@@ -693,6 +694,10 @@ Feature list:
 *   `twisting_vines` (1.16)
 *   `basalt_pillar` (1.16)
 
+### `reload_chunk(pos)`
+
+Sends full chunk data to clients. Useful when lots stuff happened and you want to refresh it on the clients.
+
 ### `reset_chunk(pos)`, `reset_chunk(from_pos, to_pos)`, `reset_chunk(l(pos, ...))`
 Removes and resets the chunk, all chunks in the specified area or all chunks in a list at once, removing all previous
 blocks and entities, and replacing it with a new generation. For all currently loaded chunks, they will be brought
diff --git a/docs/scarpet/resources/editors/idea/2.txt b/docs/scarpet/resources/editors/idea/2.txt
index 15f9ee89..e62bf3e0 100644
--- a/docs/scarpet/resources/editors/idea/2.txt
+++ b/docs/scarpet/resources/editors/idea/2.txt
@@ -66,6 +66,7 @@ property
 query
 random_tick
 rect
+reload_chunk
 remove_all_markers
 reset_chunk
 run
diff --git a/docs/scarpet/resources/editors/npp/scarpet.xml b/docs/scarpet/resources/editors/npp/scarpet.xml
index cfcde776..8491a743 100644
--- a/docs/scarpet/resources/editors/npp/scarpet.xml
+++ b/docs/scarpet/resources/editors/npp/scarpet.xml
@@ -55,7 +55,7 @@
                 set without_updates
                 blocks_movement block_sound material map_colour property block_properties block_data poi set_poi
                 place_item set_biome biome loaded_status generation_status inhabited_time spawn_potential chunk_tickets
-                structure_eligibility structures structure_references set_structure reset_chunk
+                structure_eligibility structures structure_references set_structure reset_chunk reload_chunk
 
                 scoreboard scoreboard_add scoreboard_remove scoreboard_display
 
diff --git a/src/main/java/carpet/script/CarpetExpression.java b/src/main/java/carpet/script/CarpetExpression.java
index 1e542cf1..700dc977 100644
--- a/src/main/java/carpet/script/CarpetExpression.java
+++ b/src/main/java/carpet/script/CarpetExpression.java
@@ -1127,12 +1127,23 @@ public class CarpetExpression
             Biome biome = Registry.BIOME.get(new Identifier(biomeName));
             if (biome == null)
                 throw new InternalExpressionException("Unknown biome: "+biomeName);
+            boolean doImmediateUpdate = true;
+            if (lv.size() > locator.offset+1)
+            {
+                doImmediateUpdate = lv.get(locator.offset+1).evalValue(c).getBoolean();
+            }
             ServerWorld world = cc.s.getWorld();
             BlockPos pos = locator.block.getPos();
             Chunk chunk = world.getChunk(pos.getX() >> 4, pos.getZ() >> 4, ChunkStatus.BIOMES);
             ((BiomeArrayInterface)chunk.getBiomeArray()).setBiomeAtIndex(pos, world,  biome);
-            this.forceChunkUpdate(pos, world);
-            return LazyValue.NULL;
+            if (doImmediateUpdate) this.forceChunkUpdate(pos, world);
+            return LazyValue.TRUE;
+        });
+
+        this.expr.addLazyFunction("reload_chunk", -1, (c, t, lv) -> {
+            CarpetContext cc = (CarpetContext)c;
+            this.forceChunkUpdate(BlockArgument.findIn(cc, lv, 0).block.getPos(), cc.s.getWorld());
+            return LazyValue.TRUE;
         });
 
         this.expr.addLazyFunction("structure_references", -1, (c, t, lv) -> {