diff --git a/overviewer_core/src/block_class.c b/overviewer_core/src/block_class.c
index d9e9b0b..2729916 100644
--- a/overviewer_core/src/block_class.c
+++ b/overviewer_core/src/block_class.c
@@ -341,7 +341,8 @@ const mc_block_t block_class_alt_height[] = {
     block_cobbled_deepslate_slab,
     block_polished_deepslate_slab,
     block_deepslate_brick_slab,
-    block_deepslate_tile_slab};
+    block_deepslate_tile_slab,
+    block_mud_brick_slab};
 const size_t block_class_alt_height_len = COUNT_OF(block_class_alt_height);
 
 const mc_block_t block_class_nether_roof[] = {
diff --git a/overviewer_core/src/mc_id.h b/overviewer_core/src/mc_id.h
index 025d6f2..4764352 100644
--- a/overviewer_core/src/mc_id.h
+++ b/overviewer_core/src/mc_id.h
@@ -405,6 +405,11 @@ enum mc_block_id {
     block_glow_lichen = 1119,
     block_spore_blossom = 1120,
 
+    block_mud = 1121,
+    block_packed_mud = 1122,
+    block_mud_bricks = 1123,
+    block_mud_brick_slab = 1124,
+
     // adding a gap in the numbering of walls to keep them all
     // in one numbering block starting at 1792
     // all blocks between 1792 and 2047 are considered walls
diff --git a/overviewer_core/src/overviewer.h b/overviewer_core/src/overviewer.h
index a8b9c88..c77c68c 100644
--- a/overviewer_core/src/overviewer.h
+++ b/overviewer_core/src/overviewer.h
@@ -31,7 +31,7 @@
 
 // increment this value if you've made a change to the c extension
 // and want to force users to rebuild
-#define OVERVIEWER_EXTENSION_VERSION 110
+#define OVERVIEWER_EXTENSION_VERSION 111
 
 #include <stdbool.h>
 #include <stdint.h>
diff --git a/overviewer_core/textures.py b/overviewer_core/textures.py
index 0141b8f..7124f6f 100644
--- a/overviewer_core/textures.py
+++ b/overviewer_core/textures.py
@@ -1698,10 +1698,10 @@ block(blockid=42, top_image="assets/minecraft/textures/block/iron_block.png")
 # double slabs and slabs
 # these wooden slabs are unobtainable without cheating, they are still
 # here because lots of pre-1.3 worlds use this blocks, add prismarine slabs
-@material(blockid=[43, 44, 181, 182, 204, 205] + list(range(11340, 11359)) +
+@material(blockid=[43, 44, 181, 182, 204, 205, 1124] + list(range(11340, 11359)) +
           list(range(1027, 1030)) + list(range(1072, 1080)) + list(range(1103, 1107)),
           data=list(range(16)),
-          transparent=[44, 182, 205] + list(range(11340, 11359)) + list(range(1027, 1030)) +
+          transparent=[44, 182, 205, 1124] + list(range(11340, 11359)) + list(range(1027, 1030)) +
           list(range(1072, 1080)) + list(range(1103, 1107)), solid=True)
 def slabs(self, blockid, data):
     if blockid == 44 or blockid == 182: 
@@ -1818,6 +1818,8 @@ def slabs(self, blockid, data):
             1106: "assets/minecraft/textures/block/deepslate_tiles.png",
         }
         top = side = self.load_image_texture(deepslate_tex[blockid]).copy()
+    elif blockid == 1124:
+        top = side = self.load_image_texture("assets/minecraft/textures/block/mud_bricks.png").copy()
 
     if blockid == 43 or blockid == 181 or blockid == 204: # double slab
         return self.build_block(top, side)
@@ -6374,3 +6376,7 @@ def spore_blossom(self, blockid, data):
     alpha_over(img, base_top, (0, 0), base_top)
     return img
 
+
+block(blockid=1121, top_image="assets/minecraft/textures/block/mud.png")
+block(blockid=1122, top_image="assets/minecraft/textures/block/packed_mud.png")
+block(blockid=1123, top_image="assets/minecraft/textures/block/mud_bricks.png")
diff --git a/overviewer_core/world.py b/overviewer_core/world.py
index 9701c70..34cd2d6 100644
--- a/overviewer_core/world.py
+++ b/overviewer_core/world.py
@@ -863,6 +863,12 @@ class RegionSet(object):
             'minecraft:glow_lichen': (1119, 0),
             'minecraft:spore_blossom': (1120, 0),
 
+            # 1.19 blocks
+            'minecraft:mud': (1121, 0),
+            'minecraft:packed_mud': (1122, 0),
+            'minecraft:mud_bricks': (1123, 0),
+            'minecraft:mud_brick_slab': (1124, 0),
+
             # New blocks
             'minecraft:carved_pumpkin': (11300, 0),
             'minecraft:spruce_pressure_plate': (11301, 0),
@@ -1053,7 +1059,7 @@ class RegionSet(object):
                         'minecraft:blackstone_slab','minecraft:polished_blackstone_slab',
                         'minecraft:polished_blackstone_brick_slab', 'minecraft:cobbled_deepslate_slab',
                         'minecraft:polished_deepslate_slab', 'minecraft:deepslate_brick_slab',
-                        'minecraft:deepslate_tile_slab'
+                        'minecraft:deepslate_tile_slab', 'minecraft:mud_brick_slab'
                          )
 
         prismarine_slabs = ('minecraft:prismarine_slab','minecraft:dark_prismarine_slab','minecraft:prismarine_brick_slab')
@@ -1201,6 +1207,9 @@ class RegionSet(object):
                     elif key == 'minecraft:deepslate_tile_slab':
                         block = 1096  # 'minecraft:deepslate_tiles'
                         data = 0
+                    elif key == 'minecraft:mud_brick_slab':
+                        block = 1123  # 'minecraft:mud_bricks
+                        data = 0
 
                 elif key in  prismarine_slabs:
                     block = 168         # minecraft:prismarine variants