diff --git a/mappings/net/minecraft/world/ChunkRegion.mapping b/mappings/net/minecraft/world/ChunkRegion.mapping
index e84d02cafa..999972f450 100644
--- a/mappings/net/minecraft/world/ChunkRegion.mapping
+++ b/mappings/net/minecraft/world/ChunkRegion.mapping
@@ -14,8 +14,17 @@ CLASS net/minecraft/class_3233 net/minecraft/world/ChunkRegion
 	FIELD field_23789 upperCorner Lnet/minecraft/class_1923;
 	FIELD field_26822 structureAccessor Lnet/minecraft/class_5138;
 	FIELD field_28557 centerPos Lnet/minecraft/class_1923;
+	FIELD field_33755 placementRadius I
+		COMMENT The number of neighboring chunks which can be accessed for block
+		COMMENT placement.
+		COMMENT
+		COMMENT <p>A value of {@code 0} means that only this chunk is accessible. A
+		COMMENT positive value means that the given amount of neighbors are accessible
+		COMMENT in each direction. A negative value means that this region shouldn't be
+		COMMENT used for block placement.
 	METHOD <init> (Lnet/minecraft/class_3218;Ljava/util/List;Lnet/minecraft/class_2806;I)V
 		ARG 1 world
+		ARG 4 placementRadius
 	METHOD method_14337 (Lnet/minecraft/class_2338;)Lnet/minecraft/class_1951;
 		ARG 1 pos
 	METHOD method_14338 markBlockForPostProcessing (Lnet/minecraft/class_2338;)V
diff --git a/mappings/net/minecraft/world/StructureWorldAccess.mapping b/mappings/net/minecraft/world/StructureWorldAccess.mapping
index 8328573f61..ea341085bf 100644
--- a/mappings/net/minecraft/world/StructureWorldAccess.mapping
+++ b/mappings/net/minecraft/world/StructureWorldAccess.mapping
@@ -2,4 +2,8 @@ CLASS net/minecraft/class_5281 net/minecraft/world/StructureWorldAccess
 	METHOD method_30275 getStructures (Lnet/minecraft/class_4076;Lnet/minecraft/class_3195;)Ljava/util/stream/Stream;
 		ARG 1 pos
 		ARG 2 feature
+	METHOD method_37368 isValidForSetBlock (Lnet/minecraft/class_2338;)Z
+		COMMENT {@return {@code true} if the given position is an accessible position
+		COMMENT for the {@code setBlockState} function}
+		ARG 1 pos
 	METHOD method_8412 getSeed ()J