diff --git a/patches/server/Configurable-feature-seeds.patch b/patches/server/Configurable-feature-seeds.patch
new file mode 100644
index 000000000..4d619dbe0
--- /dev/null
+++ b/patches/server/Configurable-feature-seeds.patch
@@ -0,0 +1,98 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Nassim Jahnke <nassim@njahnke.dev>
+Date: Tue, 31 Aug 2021 17:05:27 +0200
+Subject: [PATCH] Configurable feature seeds
+
+Co-authored-by: Thonk <30448663+ExcessiveAmountsOfZombies@users.noreply.github.com>
+
+diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
++++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+@@ -0,0 +0,0 @@ public class PaperWorldConfig {
+         return table;
+     }
+ 
++    public it.unimi.dsi.fastutil.objects.Object2LongOpenHashMap<net.minecraft.resources.ResourceLocation> featureSeeds = new it.unimi.dsi.fastutil.objects.Object2LongOpenHashMap<>();
++    private void featureSeeds() {
++        featureSeeds.defaultReturnValue(-1);
++        final boolean randomise = getBoolean("feature-seeds.generate-random-seeds-for-all", false);
++        final ConfigurationSection defaultSection = config.getConfigurationSection("world-settings.default.feature-seeds");
++        final ConfigurationSection section = config.getConfigurationSection("world-settings." + worldName + ".feature-seeds");
++        final net.minecraft.core.Registry<net.minecraft.world.level.levelgen.feature.ConfiguredFeature<?, ?>> registry
++            = net.minecraft.server.MinecraftServer.getServer().registryAccess().registryOrThrow(net.minecraft.core.Registry.CONFIGURED_FEATURE_REGISTRY);
++        if (section != null) {
++            loadFeatureSeeds(section, registry);
++        }
++
++        // Also use default set seeds if not already set per world
++        loadFeatureSeeds(defaultSection, registry);
++
++        if (randomise) {
++            final Map<String, Object> randomisedSeeds = new HashMap<>();
++            final java.util.Random random = new java.util.Random();
++            for (final net.minecraft.resources.ResourceLocation resourceLocation : registry.keySet()) {
++                if (featureSeeds.containsKey(resourceLocation)) {
++                    continue;
++                }
++
++                final long seed = random.nextLong();
++                randomisedSeeds.put("world-settings." + worldName + ".feature-seeds." + resourceLocation.getPath(), seed);
++                featureSeeds.put(resourceLocation, seed);
++            }
++            if (!randomisedSeeds.isEmpty()) {
++                config.addDefaults(randomisedSeeds);
++            }
++        }
++    }
++
++    private void loadFeatureSeeds(final ConfigurationSection section, final net.minecraft.core.Registry<net.minecraft.world.level.levelgen.feature.ConfiguredFeature<?, ?>> registry) {
++        for (final String key : section.getKeys(false)) {
++            if (!(section.get(key) instanceof Number)) {
++                continue;
++            }
++
++            final net.minecraft.resources.ResourceLocation location = new net.minecraft.resources.ResourceLocation(key);
++            if (!registry.containsKey(location)) {
++                logError("Invalid feature resource location: " + location);
++                continue;
++            }
++
++            featureSeeds.putIfAbsent(location, section.getLong(key));
++        }
++    }
++
+     public int getBehaviorTickRate(String typeName, String entityType, int def) {
+         return getIntOrDefault(behaviorTickRates, typeName, entityType, def);
+     }
+diff --git a/src/main/java/net/minecraft/world/level/biome/Biome.java b/src/main/java/net/minecraft/world/level/biome/Biome.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/world/level/biome/Biome.java
++++ b/src/main/java/net/minecraft/world/level/biome/Biome.java
+@@ -0,0 +0,0 @@ public final class Biome {
+ 
+     public void generate(StructureFeatureManager structureAccessor, ChunkGenerator chunkGenerator, WorldGenRegion region, long populationSeed, WorldgenRandom random, BlockPos origin) {
+         List<List<Supplier<ConfiguredFeature<?, ?>>>> list = this.generationSettings.features();
+-        Registry<ConfiguredFeature<?, ?>> registry = region.registryAccess().registryOrThrow(Registry.CONFIGURED_FEATURE_REGISTRY);
++        Registry<ConfiguredFeature<?, ?>> registry = region.registryAccess().registryOrThrow(Registry.CONFIGURED_FEATURE_REGISTRY); // Paper - diff on change
+         Registry<StructureFeature<?>> registry2 = region.registryAccess().registryOrThrow(Registry.STRUCTURE_FEATURE_REGISTRY);
+         int i = GenerationStep.Decoration.values().length;
+ 
+@@ -0,0 +0,0 @@ public final class Biome {
+                     Supplier<String> supplier3 = () -> {
+                         return registry.getResourceKey(configuredFeature).map(Object::toString).orElseGet(configuredFeature::toString);
+                     };
+-                    random.setFeatureSeed(populationSeed, k, j);
++                    // Paper start - change populationSeed used in random
++                    long featurePopulationSeed = populationSeed;
++                    final ResourceLocation location = registry.getKey(configuredFeature);
++                    final long configFeatureSeed = region.getMinecraftWorld().paperConfig.featureSeeds.getLong(location);
++                    if (configFeatureSeed != -1) {
++                        final ChunkPos center = region.getCenter();
++                        featurePopulationSeed = random.setDecorationSeed(configFeatureSeed, center.getMinBlockX(), center.getMinBlockZ()); // See ChunkGenerator#addVanillaDecorations
++                    }
++                    random.setFeatureSeed(featurePopulationSeed, k, j);
++                    // Paper end
+ 
+                     try {
+                         region.setCurrentlyGenerating(supplier3);
diff --git a/patches/server/Paper-config-files.patch b/patches/server/Paper-config-files.patch
index 2b46cbe0f..f5cc5f115 100644
--- a/patches/server/Paper-config-files.patch
+++ b/patches/server/Paper-config-files.patch
@@ -546,6 +546,11 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        return config.getInt("world-settings." + worldName + "." + path, config.getInt("world-settings.default." + path));
 +    }
 +
++    private long getLong(String path, long def) {
++        config.addDefault("world-settings.default." + path, def);
++        return config.getLong("world-settings." + worldName + "." + path, config.getLong("world-settings.default." + path));
++    }
++
 +    private float getFloat(String path, float def) {
 +        // TODO: Figure out why getFloat() always returns the default value.
 +        return (float) getDouble(path, (double) def);