diff --git a/mappings/net/minecraft/client/item/ModelPredicateProviderRegistry.mapping b/mappings/net/minecraft/client/item/ModelPredicateProviderRegistry.mapping
index 61a211d67e..fd6d53d6ac 100644
--- a/mappings/net/minecraft/client/item/ModelPredicateProviderRegistry.mapping
+++ b/mappings/net/minecraft/client/item/ModelPredicateProviderRegistry.mapping
@@ -6,14 +6,105 @@ CLASS net/minecraft/class_5272 net/minecraft/client/item/ModelPredicateProviderR
 	FIELD field_24447 DAMAGE_PROVIDER Lnet/minecraft/class_6395;
 	FIELD field_24448 ITEM_SPECIFIC Ljava/util/Map;
 	FIELD field_32947 CUSTOM_MODEL_DATA_KEY Ljava/lang/String;
+	METHOD method_27877 (Lnet/minecraft/class_1792;)Ljava/util/Map;
+		ARG 0 key
 	METHOD method_27878 get (Lnet/minecraft/class_1792;Lnet/minecraft/class_2960;)Lnet/minecraft/class_1800;
 		ARG 0 item
 		ARG 1 id
 	METHOD method_27879 register (Lnet/minecraft/class_1792;Lnet/minecraft/class_2960;Lnet/minecraft/class_6395;)V
 		ARG 0 item
 		ARG 1 id
+		ARG 2 provider
+	METHOD method_27880 (Lnet/minecraft/class_1799;Lnet/minecraft/class_638;Lnet/minecraft/class_1309;I)F
+		ARG 0 stack
+		ARG 1 world
+		ARG 2 entity
+		ARG 3 seed
 	METHOD method_27881 register (Lnet/minecraft/class_2960;Lnet/minecraft/class_6395;)Lnet/minecraft/class_6395;
 		ARG 0 id
+		ARG 1 provider
+	METHOD method_27882 (Lnet/minecraft/class_1799;Lnet/minecraft/class_638;Lnet/minecraft/class_1309;I)F
+		ARG 0 stack
+		ARG 1 world
+		ARG 2 entity
+		ARG 3 seed
+	METHOD method_27883 (Lnet/minecraft/class_1799;Lnet/minecraft/class_638;Lnet/minecraft/class_1309;I)F
+		ARG 0 stack
+		ARG 1 world
+		ARG 2 entity
+		ARG 3 seed
+	METHOD method_27884 (Lnet/minecraft/class_1799;Lnet/minecraft/class_638;Lnet/minecraft/class_1309;I)F
+		ARG 0 stack
+		ARG 1 world
+		ARG 2 entity
+		ARG 3 seed
+	METHOD method_27885 (Lnet/minecraft/class_1799;Lnet/minecraft/class_638;Lnet/minecraft/class_1309;I)F
+		ARG 0 stack
+		ARG 1 world
+		ARG 2 entity
+		ARG 3 seed
+	METHOD method_27886 (Lnet/minecraft/class_1799;Lnet/minecraft/class_638;Lnet/minecraft/class_1309;I)F
+		ARG 0 stack
+		ARG 1 world
+		ARG 2 entity
+		ARG 3 seed
+	METHOD method_27887 (Lnet/minecraft/class_1799;Lnet/minecraft/class_638;Lnet/minecraft/class_1309;I)F
+		ARG 0 stack
+		ARG 1 world
+		ARG 2 entity
+		ARG 3 seed
+	METHOD method_27888 (Lnet/minecraft/class_1799;Lnet/minecraft/class_638;Lnet/minecraft/class_1309;I)F
+		ARG 0 stack
+		ARG 1 world
+		ARG 2 entity
+		ARG 3 seed
+	METHOD method_27889 (Lnet/minecraft/class_1799;Lnet/minecraft/class_638;Lnet/minecraft/class_1309;I)F
+		ARG 0 stack
+		ARG 1 world
+		ARG 2 entity
+		ARG 3 seed
+	METHOD method_27890 (Lnet/minecraft/class_1799;Lnet/minecraft/class_638;Lnet/minecraft/class_1309;I)F
+		ARG 0 stack
+		ARG 1 world
+		ARG 2 entity
+		ARG 3 seed
+	METHOD method_27891 (Lnet/minecraft/class_1799;Lnet/minecraft/class_638;Lnet/minecraft/class_1309;I)F
+		ARG 0 stack
+		ARG 1 world
+		ARG 2 entity
+		ARG 3 seed
+	METHOD method_27892 (Lnet/minecraft/class_1799;Lnet/minecraft/class_638;Lnet/minecraft/class_1309;I)F
+		ARG 0 stack
+		ARG 1 world
+		ARG 2 entity
+		ARG 3 seed
+	METHOD method_27893 (Lnet/minecraft/class_1799;Lnet/minecraft/class_638;Lnet/minecraft/class_1309;I)F
+		ARG 0 stack
+		ARG 1 world
+		ARG 2 entity
+		ARG 3 seed
+	METHOD method_27894 (Lnet/minecraft/class_1799;Lnet/minecraft/class_638;Lnet/minecraft/class_1309;I)F
+		ARG 0 stack
+		ARG 1 world
+		ARG 2 entity
+		ARG 3 seed
+	METHOD method_27895 (Lnet/minecraft/class_1799;Lnet/minecraft/class_638;Lnet/minecraft/class_1309;I)F
+		ARG 0 stack
+		ARG 1 world
+		ARG 2 entity
+		ARG 3 seed
+	METHOD method_32202 (Lnet/minecraft/class_1799;Lnet/minecraft/class_638;Lnet/minecraft/class_1309;I)F
+		ARG 0 stack
+		ARG 1 world
+		ARG 2 entity
+		ARG 3 seed
+	METHOD method_35803 (Lnet/minecraft/class_1799;Lnet/minecraft/class_638;Lnet/minecraft/class_1309;I)F
+		ARG 0 stack
+		ARG 1 world
+		ARG 2 entity
+		ARG 3 seed
+	METHOD method_37106 registerCustomModelData (Lnet/minecraft/class_1800;)V
+		ARG 0 provider
 	CLASS 1
 		FIELD field_7910 step D
 		FIELD field_7911 time D
@@ -22,8 +113,8 @@ CLASS net/minecraft/class_5272 net/minecraft/client/item/ModelPredicateProviderR
 			ARG 1 world
 			ARG 2 skyAngle
 	CLASS 2
-		FIELD field_24449 value Lnet/minecraft/class_5272$class_5171;
-		FIELD field_24450 speed Lnet/minecraft/class_5272$class_5171;
+		FIELD field_24449 aimedInterpolator Lnet/minecraft/class_5272$class_5171;
+		FIELD field_24450 aimlessInterpolator Lnet/minecraft/class_5272$class_5171;
 		METHOD method_27896 getItemFrameAngleOffset (Lnet/minecraft/class_1533;)D
 			ARG 1 itemFrame
 		METHOD method_27897 getLodestonePos (Lnet/minecraft/class_1937;Lnet/minecraft/class_2487;)Lnet/minecraft/class_2338;
@@ -34,11 +125,16 @@ CLASS net/minecraft/class_5272 net/minecraft/client/item/ModelPredicateProviderR
 			ARG 2 entity
 		METHOD method_27899 getSpawnPos (Lnet/minecraft/class_638;)Lnet/minecraft/class_2338;
 			ARG 1 world
+		METHOD method_32800 scatter (I)I
+			COMMENT Scatters a seed by integer overflow in multiplication onto the whole
+			COMMENT int domain.
+			ARG 1 seed
 	CLASS class_5171 AngleInterpolator
 		FIELD field_23980 value D
 		FIELD field_23981 speed D
 		FIELD field_23982 lastUpdateTime J
 		METHOD method_27190 update (JD)V
 			ARG 1 time
+			ARG 3 target
 		METHOD method_27316 shouldUpdate (J)Z
 			ARG 1 time