diff --git a/mappings/net/minecraft/world/biome/source/MultiNoiseBiomeSource.mapping b/mappings/net/minecraft/world/biome/source/MultiNoiseBiomeSource.mapping
index cb79cac6f4..cfdfcdcb07 100644
--- a/mappings/net/minecraft/world/biome/source/MultiNoiseBiomeSource.mapping
+++ b/mappings/net/minecraft/world/biome/source/MultiNoiseBiomeSource.mapping
@@ -5,16 +5,65 @@ CLASS net/minecraft/class_4766 net/minecraft/world/biome/source/MultiNoiseBiomeS
 	FIELD field_22081 weirdnessNoise Lnet/minecraft/class_5216;
 	FIELD field_24115 biomePoints Ljava/util/List;
 	FIELD field_24116 threeDimensionalSampling Z
-	FIELD field_24719 CODEC Lcom/mojang/serialization/Codec;
+	FIELD field_24718 CODEC Lcom/mojang/serialization/MapCodec;
+	FIELD field_24719 INSTANCE_CODEC Lcom/mojang/serialization/Codec;
 	FIELD field_24720 seed J
+	FIELD field_24721 instance Ljava/util/Optional;
+	FIELD field_26433 DEFAULT_NOISE_PARAMETERS Lnet/minecraft/class_4766$class_5487;
+	FIELD field_26434 temperatureNoiseParameters Lnet/minecraft/class_4766$class_5487;
+	FIELD field_26435 humidityNoiseParameters Lnet/minecraft/class_4766$class_5487;
+	FIELD field_26436 altitudeNoiseParameters Lnet/minecraft/class_4766$class_5487;
+	FIELD field_26437 weirdnessNoiseParameters Lnet/minecraft/class_4766$class_5487;
 	METHOD <init> (JLjava/util/List;Ljava/util/Optional;)V
 		ARG 1 seed
+		ARG 3 biomePoints
+		ARG 4 instance
+	METHOD <init> (JLjava/util/List;Lnet/minecraft/class_4766$class_5487;Lnet/minecraft/class_4766$class_5487;Lnet/minecraft/class_4766$class_5487;Lnet/minecraft/class_4766$class_5487;)V
+		ARG 1 seed
+		ARG 3 biomePoints
+		ARG 4 temperatureNoiseParameters
+		ARG 5 humidityNoiseParameters
+		ARG 6 altitudeNoiseParameters
+		ARG 7 weirdnessNoiseParameters
 	METHOD <init> (JLjava/util/List;Lnet/minecraft/class_4766$class_5487;Lnet/minecraft/class_4766$class_5487;Lnet/minecraft/class_4766$class_5487;Lnet/minecraft/class_4766$class_5487;Ljava/util/Optional;)V
 		ARG 1 seed
+		ARG 3 biomePoints
+		ARG 4 temperatureNoiseParameters
+		ARG 5 humidityNoiseParameters
+		ARG 6 altitudeNoiseParameters
+		ARG 7 weirdnessNoiseParameters
+		ARG 8 instance
+	METHOD method_31085 getInstance ()Ljava/util/Optional;
 	CLASS class_5305 Preset
 		FIELD field_24723 NETHER Lnet/minecraft/class_4766$class_5305;
+		FIELD field_24724 BY_IDENTIFIER Ljava/util/Map;
 		FIELD field_24725 id Lnet/minecraft/class_2960;
 		FIELD field_24726 biomeSourceFunction Lcom/mojang/datafixers/util/Function3;
 		METHOD <init> (Lnet/minecraft/class_2960;Lcom/mojang/datafixers/util/Function3;)V
 			ARG 1 id
+			ARG 2 biomeSourceFunction
 		METHOD method_28469 getBiomeSource (Lnet/minecraft/class_2378;J)Lnet/minecraft/class_4766;
+			ARG 1 biomeRegistry
+			ARG 2 seed
+	CLASS class_5487 NoiseParameters
+		FIELD field_26438 CODEC Lcom/mojang/serialization/Codec;
+		FIELD field_26439 firstOctave I
+		FIELD field_26440 amplitudes Lit/unimi/dsi/fastutil/doubles/DoubleList;
+		METHOD <init> (ILjava/util/List;)V
+			ARG 1 firstOctave
+			ARG 2 amplitudes
+		METHOD method_30832 getFirstOctave ()I
+		METHOD method_30834 getAmplitudes ()Lit/unimi/dsi/fastutil/doubles/DoubleList;
+	CLASS class_5502 Instance
+		FIELD field_26694 CODEC Lcom/mojang/serialization/MapCodec;
+		FIELD field_26695 preset Lnet/minecraft/class_4766$class_5305;
+		FIELD field_26696 biomeRegistry Lnet/minecraft/class_2378;
+		FIELD field_26697 seed J
+		METHOD <init> (Lnet/minecraft/class_4766$class_5305;Lnet/minecraft/class_2378;J)V
+			ARG 1 preset
+			ARG 2 biomeRegistry
+			ARG 3 seed
+		METHOD method_31094 getPreset ()Lnet/minecraft/class_4766$class_5305;
+		METHOD method_31098 getBiomeRegistry ()Lnet/minecraft/class_2378;
+		METHOD method_31100 getSeed ()J
+		METHOD method_31101 getBiomeSource ()Lnet/minecraft/class_4766;