src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/PlayerRace.java

@@ -4,16 +4,15 @@ import eu.mhsl.minenet.minigames.instance.Dimension;
 import eu.mhsl.minenet.minigames.instance.game.stateless.StatelessGame;
 import eu.mhsl.minenet.minigames.score.LastWinsScore;
 import net.minestom.server.coordinate.Pos;
-import net.minestom.server.instance.batch.AbsoluteBlockBatch;
 import net.minestom.server.instance.block.Block;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.concurrent.CompletableFuture;
 
 public class PlayerRace extends StatelessGame {
-    public PlayerRace() {
+    public PlayerRace(int obstacleCount) {
         super(Dimension.THE_END.key, "PlayerRace", new LastWinsScore());
-        this.setGenerator(new PlayerRaceChunkgenerator(64));
+        this.setGenerator(new PlayerRaceChunkgenerator(64, obstacleCount));
     }
 
     @Override

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/PlayerRaceChunkgenerator.java

@@ -6,44 +6,56 @@ import eu.mhsl.minenet.minigames.world.BlockPallet;
 import eu.mhsl.minenet.minigames.world.generator.featureEnriched.ValeGenerator;
 import eu.mhsl.minenet.minigames.world.generator.terrain.BaseGenerator;
 import net.minestom.server.coordinate.Point;
+import net.minestom.server.coordinate.Vec;
 import net.minestom.server.instance.block.Block;
-
+import net.minestom.server.instance.generator.GenerationUnit;
-import java.util.function.BiConsumer;
 
 public class PlayerRaceChunkgenerator extends BaseGenerator {
-    public PlayerRaceChunkgenerator(int height) {
+    private static final int START_LENGTH = 16;
+    private static final int GAP_LENGTH = 3;
+    private static final int PERIOD = Obstacle.LENGTH + GAP_LENGTH;
+
+    public PlayerRaceChunkgenerator(int height, int obstacleCount) {
         ValeGenerator vale = new ValeGenerator();
         vale.setXShiftMultiplier(integer -> 0.5d);
         vale.setHeightNoiseMultiplier(integer -> 2);
         this.addMixIn(vale);
 
+        int finishStart = START_LENGTH + obstacleCount * PERIOD;
+        int finishEnd = finishStart + 16;
+
         this.addMixIn(unit -> {
-            if (
+            Point chunkStart = unit.absoluteStart();
-                unit.absoluteStart().chunkX() != 0 ||
+            if(
-                unit.absoluteStart().chunkZ() < 0 ||
+                chunkStart.chunkX() != 0 ||
-                unit.absoluteStart().chunkZ() > 16
+                chunkStart.blockZ() + 16 <= 0 ||
+                chunkStart.blockZ() >= finishEnd
             ) return;
 
-            Point start = unit.absoluteStart().withY(height);
+            GeneratorUtils.foreachXZ(unit, point -> {
+                Block ground = groundBlockAt(point.blockZ(), finishStart, finishEnd);
+                if(ground != null) unit.modifier().setBlock(point.withY(height), ground);
+            });
 
-            if(unit.absoluteStart().chunkZ() % 2 == 1) {
+            for(int i = 0; i < obstacleCount; i++) {
-                Obstacle.getRandomObstacle().generate(unit, start);
+                int obstacleZ = START_LENGTH + i * PERIOD;
-                return;
+                if(obstacleZ < chunkStart.blockZ() || obstacleZ >= chunkStart.blockZ() + 16) continue;
+
+                GenerationUnit fork = unit.fork(
+                    new Vec(chunkStart.blockX(), height - 8, obstacleZ),
+                    new Vec(chunkStart.blockX() + 16, height + 16, obstacleZ + Obstacle.LENGTH)
+                );
+                Obstacle.getRandomObstacle().generate(fork, new Vec(chunkStart.blockX(), height, obstacleZ));
             }
-
-            BiConsumer<Point, Block> setBlock = (Point point, Block block) -> unit.modifier().setBlock(point.withY(height), block);
-
-            if(unit.absoluteStart().chunkZ() == 0) {
-                GeneratorUtils.foreachXZ(unit, point -> setBlock.accept(point, Block.AMETHYST_BLOCK));
-                return;
-            }
-
-            if(unit.absoluteStart().chunkZ() == 16) {
-                GeneratorUtils.foreachXZ(unit, point -> setBlock.accept(point, Block.DIAMOND_BLOCK));
-                return;
-            }
-
-            GeneratorUtils.foreachXZ(unit, point -> setBlock.accept(point, BlockPallet.GROUND.rnd()));
         });
     }
+
+    private static Block groundBlockAt(int z, int finishStart, int finishEnd) {
+        if(z < 0 || z >= finishEnd) return null;
+        if(z < START_LENGTH) return Block.AMETHYST_BLOCK;
+        if(z >= finishStart) return Block.DIAMOND_BLOCK;
+
+        int relative = (z - START_LENGTH) % PERIOD;
+        return relative >= Obstacle.LENGTH ? BlockPallet.GROUND.rnd() : null;
+    }
 }

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/PlayerRaceFactory.java

@@ -1,8 +1,10 @@
 package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace;
 
 import eu.mhsl.minenet.minigames.instance.game.Game;
+import eu.mhsl.minenet.minigames.instance.game.stateless.config.ConfigManager;
 import eu.mhsl.minenet.minigames.instance.game.stateless.config.GameFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.config.Option;
+import eu.mhsl.minenet.minigames.instance.game.stateless.config.common.NumericOption;
 import eu.mhsl.minenet.minigames.instance.room.Room;
 import eu.mhsl.minenet.minigames.message.component.TranslatedComponent;
 import net.minestom.server.item.Material;
@@ -15,9 +17,15 @@ public class PlayerRaceFactory implements GameFactory {
         return TranslatedComponent.byId("game_PlayerRace#name");
     }
 
+    @Override
+    public ConfigManager configuration() {
+        return new ConfigManager()
+            .addOption(new NumericOption("length", Material.RAIL, TranslatedComponent.byId("optionCommon#length"), 8, 12, 16, 20));
+    }
+
     @Override
     public Game manufacture(Room parent, Map<String, Option<?>> configuration) throws Exception {
-        return new PlayerRace().setParent(parent);
+        return new PlayerRace(configuration.get("length").getAsInt()).setParent(parent);
     }
 
     @Override

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/BambooThicket.java

@@ -0,0 +1,34 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * Dichter Bambushain: Die dünnen Halme haben kleine Hitboxen —
+ * wer sich geschickt durchschlängelt, verliert kaum Tempo.
+ */
+class BambooThicket extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            unit.modifier().setBlock(point.withY(start.blockY()), rnd.nextInt(3) == 0 ? Block.PODZOL : Block.GRASS_BLOCK);
+
+            int z = relZ(point, start);
+            if(z < 2 || z > 13 || rnd.nextInt(100) >= 45) return;
+
+            int height = 3 + rnd.nextInt(3);
+            for(int y = 1; y <= height; y++) {
+                String leaves = y == height ? "large" : y == height - 1 ? "small" : "none";
+                unit.modifier().setBlock(
+                    point.withY(start.blockY() + y),
+                    Block.BAMBOO.withProperty("age", "1").withProperty("leaves", leaves)
+                );
+            }
+        });
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/BasaltPillars.java

@@ -0,0 +1,47 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import de.articdive.jnoise.JNoise;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * Basaltdeltas-Säulenfeld: Hohe Basaltsäulen mit Seelenlaternen bilden
+ * einen düsteren Hindernisparcours zum Durchkurven.
+ */
+class BasaltPillars extends Obstacle {
+    private final JNoise ground = JNoise.newBuilder()
+        .fastSimplex()
+        .setFrequency(0.13)
+        .build();
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            double noise = this.ground.getNoise(point.blockX(), point.blockZ());
+            Block floor = noise > 0.4 ? Block.SOUL_SOIL : noise < -0.4 ? Block.BASALT : Block.BLACKSTONE;
+            unit.modifier().setBlock(point.withY(start.blockY()), floor);
+        });
+
+        for(int i = 0; i < 16; i++) {
+            int x = rnd.nextInt(16);
+            int z = 2 + rnd.nextInt(12);
+            int height = 2 + rnd.nextInt(3);
+            boolean thick = rnd.nextInt(3) == 0 && x < 15;
+            Block pillar = rnd.nextInt(3) == 0 ? Block.POLISHED_BASALT : Block.BASALT;
+            for(int y = 1; y <= height; y++) {
+                unit.modifier().setBlock(start.add(x, y, z), pillar);
+                if(thick) {
+                    unit.modifier().setBlock(start.add(x + 1, y, z), pillar);
+                }
+            }
+            if(rnd.nextInt(3) == 0) {
+                unit.modifier().setBlock(start.add(x, height + 1, z), Block.SOUL_LANTERN);
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/BerryPatch.java

@@ -0,0 +1,33 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * Süßbeerenfeld: Die Büsche bremsen stark. Ein geschwungener Trampelpfad
+ * führt hindurch, ist aber in der Mitte selbst zugewuchert —
+ * ganz ohne Gestrüpp kommt hier niemand durch.
+ */
+class BerryPatch extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            int z = relZ(point, start);
+            int pathX = 7 + (int) Math.round(5 * Math.sin(z * Math.PI / 7.5));
+            boolean onPath = relX(point, start) == pathX || relX(point, start) == pathX + 1;
+            boolean overgrown = z == 8;
+
+            unit.modifier().setBlock(point.withY(start.blockY()), onPath ? Block.DIRT_PATH : Block.GRASS_BLOCK);
+
+            boolean bush = onPath ? overgrown : z >= 1 && z <= 14 && rnd.nextInt(100) < 45;
+            if(bush) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), Block.SWEET_BERRY_BUSH.withProperty("age", "3"));
+            }
+        });
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/BoulderTrench.java

@@ -0,0 +1,44 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * Ausgetrocknetes Flussbett: Ein zwei Blöcke tiefer Graben quer zur Strecke,
+ * auf dessen Grund bemooste Findlinge liegen. Rein springen, durchkämpfen, rausklettern.
+ */
+class BoulderTrench extends Obstacle {
+    private static final int[] DEPTHS = {0, 0, 0, 0, 0, 1, 2, 2, 2, 2, 1, 0, 0, 0, 0, 0};
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            int depth = DEPTHS[relZ(point, start)];
+            for(int y = start.blockY() - 2; y < start.blockY() - depth; y++) {
+                unit.modifier().setBlock(point.withY(y), Block.STONE);
+            }
+            Block floor = depth == 0
+                ? Block.GRASS_BLOCK
+                : rnd.nextBoolean() ? Block.COARSE_DIRT : Block.GRAVEL;
+            unit.modifier().setBlock(point.withY(start.blockY() - depth), floor);
+        });
+
+        for(int i = 0; i < 10; i++) {
+            int x = rnd.nextInt(16);
+            int z = 6 + rnd.nextInt(4);
+            unit.modifier().setBlock(start.add(x, -1, z), rnd.nextBoolean() ? Block.MOSSY_COBBLESTONE : Block.COBBLESTONE);
+            if(rnd.nextInt(3) == 0) {
+                unit.modifier().setBlock(start.add(x, 0, z), Block.MOSSY_COBBLESTONE);
+            }
+        }
+
+        for(int i = 0; i < 4; i++) {
+            unit.modifier().setBlock(start.add(rnd.nextInt(16), -1, 6 + rnd.nextInt(4)), Block.COBWEB);
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/ChorusGrove.java

@@ -0,0 +1,70 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * End-Ruine: Zwei Endstein-Ziegelmauern (nicht überspringbar) mit versetzten,
+ * schmalen Durchgängen, dazwischen ein dichtes Chorus-Dickicht und
+ * Purpur-Trümmer. Passt zur End-Dimension des Spiels.
+ */
+class ChorusGrove extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            Block floor = rnd.nextInt(14) == 0 ? Block.PURPUR_BLOCK : Block.END_STONE;
+            unit.modifier().setBlock(point.withY(start.blockY()), floor);
+        });
+
+        int[] rows = {5, 10};
+        for(int i = 0; i < rows.length; i++) {
+            int gapStart = i % 2 == 0 ? 1 + rnd.nextInt(4) : 10 + rnd.nextInt(4);
+
+            boolean[] hasWall = new boolean[16];
+            for(int x = 0; x < 16; x++) {
+                hasWall[x] = x < gapStart || x >= gapStart + 2;
+            }
+
+            for(int x = 0; x < 16; x++) {
+                if(!hasWall[x]) continue;
+                boolean westConnected = x > 0 && hasWall[x - 1];
+                boolean eastConnected = x < 15 && hasWall[x + 1];
+                Block wall = Block.END_STONE_BRICK_WALL
+                    .withProperty("west", westConnected ? "low" : "none")
+                    .withProperty("east", eastConnected ? "low" : "none")
+                    .withProperty("up", String.valueOf(!westConnected || !eastConnected || x % 4 == 0));
+                unit.modifier().setBlock(start.add(x, 1, rows[i]), wall);
+
+                if(rnd.nextInt(6) == 0) {
+                    unit.modifier().setBlock(start.add(x, 2, rows[i]), Block.END_ROD);
+                }
+            }
+        }
+
+        for(int i = 0; i < 15; i++) {
+            int x = rnd.nextInt(16);
+            int z = 2 + rnd.nextInt(12);
+            if(z == 5 || z == 10) continue;
+            int height = 1 + rnd.nextInt(3);
+            for(int y = 1; y <= height; y++) {
+                unit.modifier().setBlock(start.add(x, y, z), Block.CHORUS_PLANT);
+            }
+            unit.modifier().setBlock(start.add(x, height + 1, z), Block.CHORUS_FLOWER.withProperty("age", "5"));
+        }
+
+        for(int i = 0; i < 5; i++) {
+            int x = rnd.nextInt(16);
+            int z = 2 + rnd.nextInt(12);
+            if(z == 5 || z == 10) continue;
+            unit.modifier().setBlock(start.add(x, 1, z), Block.PURPUR_BLOCK);
+            if(rnd.nextBoolean()) {
+                unit.modifier().setBlock(start.add(x, 2, z), Block.PURPUR_BLOCK);
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/CobwebGrove.java

@@ -0,0 +1,49 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import de.articdive.jnoise.JNoise;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * Verlassener Fichtenhain: Spinnweben zwischen alten Baumstümpfen
+ * bremsen jeden, der nicht sauber um sie herumläuft.
+ */
+class CobwebGrove extends Obstacle {
+    private final JNoise soil = JNoise.newBuilder()
+        .fastSimplex()
+        .setFrequency(0.12)
+        .build();
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            Block floor = this.soil.getNoise(point.blockX(), point.blockZ()) > 0 ? Block.PODZOL : Block.COARSE_DIRT;
+            unit.modifier().setBlock(point.withY(start.blockY()), floor);
+
+            int z = relZ(point, start);
+            if(z < 2 || z > 13) return;
+
+            int roll = rnd.nextInt(100);
+            if(roll < 28) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), Block.COBWEB);
+                if(roll < 8) unit.modifier().setBlock(point.withY(start.blockY() + 2), Block.COBWEB);
+            } else if(roll < 36) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), Block.FERN);
+            }
+        });
+
+        for(int i = 0; i < 4; i++) {
+            int x = rnd.nextInt(16);
+            int z = 3 + rnd.nextInt(10);
+            int height = 1 + rnd.nextInt(2);
+            for(int y = 1; y <= height; y++) {
+                unit.modifier().setBlock(start.add(x, y, z), Block.SPRUCE_LOG);
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/DripstoneSpikes.java

@@ -0,0 +1,51 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * Tropfsteinkamm: Drei Zackenreihen aus Dripstone-Sockeln mit Stalagmiten
+ * obendrauf sind unpassierbar — nur die versetzten Lücken führen hindurch.
+ * Dazwischen ragen weitere Stalagmiten aus dem Boden.
+ */
+class DripstoneSpikes extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point ->
+            unit.modifier().setBlock(point.withY(start.blockY()), rnd.nextInt(6) == 0 ? Block.STONE : Block.DRIPSTONE_BLOCK));
+
+        int[] rows = {4, 8, 12};
+        for(int i = 0; i < rows.length; i++) {
+            int gapStart = i % 2 == 0 ? 2 + rnd.nextInt(4) : 9 + rnd.nextInt(4);
+            for(int x = 0; x < 16; x++) {
+                if(x >= gapStart && x < gapStart + 2) continue;
+                unit.modifier().setBlock(start.add(x, 1, rows[i]), Block.DRIPSTONE_BLOCK);
+                this.placeSpike(unit, start.add(0, 1, 0), x, rows[i], 1 + rnd.nextInt(2));
+            }
+        }
+
+        for(int i = 0; i < 12; i++) {
+            int x = rnd.nextInt(16);
+            int z = 2 + rnd.nextInt(12);
+            if(z == 4 || z == 8 || z == 12) continue;
+            this.placeSpike(unit, start, x, z, 1 + rnd.nextInt(3));
+        }
+    }
+
+    private void placeSpike(GenerationUnit unit, Point start, int x, int z, int height) {
+        for(int y = 1; y <= height; y++) {
+            String thickness = y == height ? "tip" : y == height - 1 ? "frustum" : "base";
+            unit.modifier().setBlock(
+                start.add(x, y, z),
+                Block.POINTED_DRIPSTONE
+                    .withProperty("thickness", thickness)
+                    .withProperty("vertical_direction", "up")
+            );
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/GlassPaneWeave.java

@@ -0,0 +1,40 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * Gläsernes Labyrinth auf Quarzboden: Fast unsichtbare Glasscheiben-Wände
+ * mit versetzten Lücken — wer rast, läuft dagegen.
+ */
+class GlassPaneWeave extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point ->
+            unit.modifier().setBlock(point.withY(start.blockY()), rnd.nextInt(5) == 0 ? Block.CALCITE : Block.QUARTZ_BLOCK));
+
+        int[] rows = {4, 8, 12};
+        for(int i = 0; i < rows.length; i++) {
+            int gapStart = i % 2 == 0 ? 2 + rnd.nextInt(3) : 11 + rnd.nextInt(3);
+
+            boolean[] hasPane = new boolean[16];
+            for(int x = 0; x < 16; x++) {
+                hasPane[x] = x < gapStart || x >= gapStart + 2;
+            }
+
+            for(int x = 0; x < 16; x++) {
+                if(!hasPane[x]) continue;
+                Block pane = (rnd.nextInt(6) == 0 ? Block.GRAY_STAINED_GLASS_PANE : Block.WHITE_STAINED_GLASS_PANE)
+                    .withProperty("west", String.valueOf(x > 0 && hasPane[x - 1]))
+                    .withProperty("east", String.valueOf(x < 15 && hasPane[x + 1]));
+                unit.modifier().setBlock(start.add(x, 1, rows[i]), pane);
+                unit.modifier().setBlock(start.add(x, 2, rows[i]), pane);
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/HayHurdles.java

@@ -0,0 +1,39 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * Bauernhof-Hürdenlauf: Vier Reihen Strohballen — die flachen müssen ohne
+ * Lücke übersprungen werden, die hohen zwingen durch eine schmale Gasse.
+ */
+class HayHurdles extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            unit.modifier().setBlock(point.withY(start.blockY()), Block.GRASS_BLOCK);
+            if(relZ(point, start) % 3 != 0 && rnd.nextInt(8) == 0) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), Block.SHORT_GRASS);
+            }
+        });
+
+        int[] rows = {3, 6, 9, 12};
+        for(int i = 0; i < rows.length; i++) {
+            boolean tall = i % 2 == 1;
+            int gapStart = rnd.nextInt(14);
+            for(int x = 0; x < 16; x++) {
+                if(tall && (x == gapStart || x == gapStart + 1)) continue;
+                Block block = rnd.nextInt(12) == 0 ? Block.CARVED_PUMPKIN : Block.HAY_BLOCK;
+                unit.modifier().setBlock(start.add(x, 1, rows[i]), block);
+                if(tall) {
+                    unit.modifier().setBlock(start.add(x, 2, rows[i]), Block.HAY_BLOCK);
+                }
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/HoneyField.java

@@ -0,0 +1,38 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import de.articdive.jnoise.JNoise;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * Honigwaben-Feld: klebrige Honigflecken im Boden bremsen, zwei Honigwände
+ * mit versetzten Durchlässen zwingen in eine Zickzack-Linie.
+ */
+class HoneyField extends Obstacle {
+    private final JNoise sticky = JNoise.newBuilder()
+        .fastSimplex()
+        .setFrequency(0.2)
+        .build();
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            boolean stickyFloor = this.sticky.getNoise(point.blockX(), point.blockZ()) > 0.35;
+            unit.modifier().setBlock(point.withY(start.blockY()), stickyFloor ? Block.HONEY_BLOCK : Block.HONEYCOMB_BLOCK);
+        });
+
+        for(int wallZ : new int[]{5, 10}) {
+            int gapStart = wallZ == 5 ? 1 + rnd.nextInt(5) : 8 + rnd.nextInt(5);
+            for(int x = 0; x < 16; x++) {
+                if(x >= gapStart && x < gapStart + 2) continue;
+                unit.modifier().setBlock(start.add(x, 1, wallZ), Block.HONEY_BLOCK);
+                unit.modifier().setBlock(start.add(x, 2, wallZ), Block.HONEY_BLOCK);
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/IceRink.java

@@ -0,0 +1,57 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import de.articdive.jnoise.JNoise;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * Spiegelglatte Eisfläche: Blue-Ice-Streifen beschleunigen unkontrolliert,
+ * zwei Eiswände mit versetzten Durchlässen müssen rutschend getroffen werden.
+ */
+class IceRink extends Obstacle {
+    private final JNoise streaks = JNoise.newBuilder()
+        .fastSimplex()
+        .setFrequency(0.15)
+        .build();
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            double noise = this.streaks.getNoise(point.blockX(), point.blockZ());
+            Block floor = noise > 0.45 ? Block.BLUE_ICE : noise < -0.55 ? Block.ICE : Block.PACKED_ICE;
+            unit.modifier().setBlock(point.withY(start.blockY()), floor);
+
+            if(relZ(point, start) >= 2 && relZ(point, start) <= 13 && rnd.nextInt(14) == 0) {
+                unit.modifier().setBlock(
+                    point.withY(start.blockY() + 1),
+                    Block.SNOW.withProperty("layers", String.valueOf(1 + rnd.nextInt(2)))
+                );
+            }
+        });
+
+        for(int wallZ : new int[]{5, 10}) {
+            int gapStart = wallZ == 5 ? 1 + rnd.nextInt(4) : 9 + rnd.nextInt(4);
+            for(int x = 0; x < 16; x++) {
+                if(x >= gapStart && x < gapStart + 3) continue;
+                unit.modifier().setBlock(start.add(x, 1, wallZ), Block.PACKED_ICE);
+                unit.modifier().setBlock(start.add(x, 2, wallZ), Block.ICE);
+                if(rnd.nextInt(4) == 0) {
+                    unit.modifier().setBlock(start.add(x, 3, wallZ), Block.SNOW.withProperty("layers", "1"));
+                }
+            }
+        }
+
+        for(int i = 0; i < 5; i++) {
+            int x = rnd.nextInt(16);
+            int z = 2 + rnd.nextInt(12);
+            if(z == 5 || z == 10) continue;
+            unit.modifier().setBlock(start.add(x, 1, z), Block.PACKED_ICE);
+            unit.modifier().setBlock(start.add(x, 2, z), Block.SNOW.withProperty("layers", "1"));
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/LadderWall.java

@@ -0,0 +1,37 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import eu.mhsl.minenet.minigames.world.BlockPallet;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * Alte Festungsmauer quer über die Strecke: Drei Blöcke hoch, zu hoch zum
+ * Springen — auf beiden Seiten hängen Leitern zum Drüberklettern.
+ */
+class LadderWall extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point ->
+            unit.modifier().setBlock(point.withY(start.blockY()), BlockPallet.STONE.rnd()));
+
+        for(int x = 0; x < 16; x++) {
+            for(int y = 1; y <= 3; y++) {
+                for(int z = 7; z <= 8; z++) {
+                    Block block = rnd.nextInt(3) == 0 ? Block.MOSSY_STONE_BRICKS : Block.STONE_BRICKS;
+                    unit.modifier().setBlock(start.add(x, y, z), block);
+                }
+                unit.modifier().setBlock(start.add(x, y, 6), Block.LADDER.withProperty("facing", "north"));
+                unit.modifier().setBlock(start.add(x, y, 9), Block.LADDER.withProperty("facing", "south"));
+            }
+
+            if(x % 5 == 2) {
+                unit.modifier().setBlock(start.add(x, 4, 7), Block.LANTERN);
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/LeafHedges.java

@@ -0,0 +1,39 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import eu.mhsl.minenet.minigames.world.BlockPallet;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * Heckengarten: Zwei Blöcke hohe Azaleen-Hecken mit versetzten Durchgängen,
+ * dazwischen blühen Blumen — hübsch, aber im Weg.
+ */
+class LeafHedges extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            unit.modifier().setBlock(point.withY(start.blockY()), Block.GRASS_BLOCK);
+            int z = relZ(point, start);
+            if(z % 4 != 0 && z >= 1 && z <= 14 && rnd.nextInt(10) == 0) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), BlockPallet.FLOWER.rnd());
+            }
+        });
+
+        int[] rows = {4, 8, 12};
+        for(int i = 0; i < rows.length; i++) {
+            int gapStart = i % 2 == 0 ? 11 + rnd.nextInt(3) : 1 + rnd.nextInt(3);
+            for(int x = 0; x < 16; x++) {
+                if(x >= gapStart && x < gapStart + 2) continue;
+                Block leaves = (rnd.nextInt(10) < 3 ? Block.FLOWERING_AZALEA_LEAVES : Block.AZALEA_LEAVES)
+                    .withProperty("persistent", "true");
+                unit.modifier().setBlock(start.add(x, 1, rows[i]), leaves);
+                unit.modifier().setBlock(start.add(x, 2, rows[i]), leaves);
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/MudPools.java

@@ -0,0 +1,44 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import de.articdive.jnoise.JNoise;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * Mangroven-Schlammbecken: Die Becken liegen einen Block tief — man fällt in
+ * den zähen Schlamm und muss sich wieder herauskämpfen, während
+ * Mangrovenwurzeln die trockenen Umwege versperren.
+ */
+class MudPools extends Obstacle {
+    private final JNoise pools = JNoise.newBuilder()
+        .fastSimplex()
+        .setFrequency(0.11)
+        .build();
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            int z = relZ(point, start);
+            double noise = this.pools.getNoise(point.blockX(), point.blockZ());
+            boolean pool = z >= 1 && z <= 14 && noise > 0.05;
+
+            if(pool) {
+                unit.modifier().setBlock(point.withY(start.blockY() - 1), Block.MUD);
+                return;
+            }
+
+            Block floor = noise > -0.3 ? Block.MUDDY_MANGROVE_ROOTS : Block.GRASS_BLOCK;
+            unit.modifier().setBlock(point.withY(start.blockY() - 1), Block.MUD);
+            unit.modifier().setBlock(point.withY(start.blockY()), floor);
+
+            if(z >= 2 && z <= 13 && rnd.nextInt(6) == 0) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), Block.MANGROVE_ROOTS);
+            }
+        });
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/Mudpit.java

@@ -1,8 +1,6 @@
 package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
 
 import de.articdive.jnoise.JNoise;
-import eu.mhsl.minenet.minigames.util.GeneratorUtils;
-import net.minestom.server.coordinate.CoordConversion;
 import net.minestom.server.coordinate.Point;
 import net.minestom.server.instance.block.Block;
 import net.minestom.server.instance.generator.GenerationUnit;
@@ -15,8 +13,8 @@ class Mudpit extends Obstacle {
 
     @Override
     public void generate(GenerationUnit unit, Point start) {
-        GeneratorUtils.foreachXZ(unit, point -> {
+        forEachColumn(start, point -> {
-            double relative = CoordConversion.globalToSectionRelative(point.blockZ());
+            double relative = relZ(point, start);
             double modifier = -1.5 * Math.cos(relative * Math.PI/7.5) + 1.5;
             double heightAtBlock = start.blockY() + this.curves.getNoise(point.blockX(), point.blockZ()) * modifier;
             unit.modifier().setBlock(point.withY(heightAtBlock), Block.SOUL_SAND);

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/MushroomRoofs.java

@@ -0,0 +1,41 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * Riesenpilz-Wäldchen auf Myzel: Die breiten Kappen hängen so tief, dass man
+ * darunter nur kriechend durchkommt — oder außen eng um die Stiele kurvt.
+ */
+class MushroomRoofs extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            unit.modifier().setBlock(point.withY(start.blockY()), Block.MYCELIUM);
+            int z = relZ(point, start);
+            if(z >= 1 && z <= 14 && rnd.nextInt(20) == 0) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), rnd.nextBoolean() ? Block.RED_MUSHROOM : Block.BROWN_MUSHROOM);
+            }
+        });
+
+        for(int stemZ : new int[]{4, 8, 12}) {
+            int x = 4 + rnd.nextInt(8);
+            Block cap = rnd.nextBoolean() ? Block.RED_MUSHROOM_BLOCK : Block.BROWN_MUSHROOM_BLOCK;
+
+            unit.modifier().setBlock(start.add(x, 1, stemZ), Block.MUSHROOM_STEM);
+
+            for(int capX = x - 3; capX <= x + 3; capX++) {
+                for(int capZ = stemZ - 1; capZ <= stemZ + 1; capZ++) {
+                    if(capX < 0 || capX > 15 || capZ < 0 || capZ > 15) continue;
+                    if(Math.abs(capX - x) == 3 && Math.abs(capZ - stemZ) == 1) continue;
+                    unit.modifier().setBlock(start.add(capX, 2, capZ), cap);
+                }
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/Obstacle.java

@@ -1,18 +1,66 @@
 package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
 
+import eu.mhsl.minenet.minigames.util.GeneratorUtils;
 import net.minestom.server.coordinate.Point;
 import net.minestom.server.instance.generator.GenerationUnit;
 
 import java.util.List;
+import java.util.Random;
 import java.util.concurrent.ThreadLocalRandom;
+import java.util.function.Consumer;
 
 public abstract class Obstacle {
-    @SuppressWarnings("StaticInitializerReferencesSubClass")
+    public static final int LENGTH = 16;
-    private static final List<Obstacle> obstacles = List.of(new Mudpit());
 
+    @SuppressWarnings("StaticInitializerReferencesSubClass")
+    private static final List<Obstacle> obstacles = List.of(
+        new Mudpit(),
+        new IceRink(),
+        new HoneyField(),
+        new CobwebGrove(),
+        new BerryPatch(),
+        new WaterChannel(),
+        new HayHurdles(),
+        new SlimePatches(),
+        new MudPools(),
+        new PowderSnowField(),
+        new DripstoneSpikes(),
+        new ChorusGrove(),
+        new BasaltPillars(),
+        new WallSlalom(),
+        new LeafHedges(),
+        new MushroomRoofs(),
+        new SandDunes(),
+        new LadderWall(),
+        new GlassPaneWeave(),
+        new BoulderTrench(),
+        new BambooThicket()
+    );
+
+    /**
+     * Generiert das Hindernis ab {@code start} (16 breit, {@link #LENGTH} lang).
+     * {@code unit} kann ein Fork sein, der über Chunk-Grenzen reicht — daher nie
+     * über die Unit-Bounds iterieren, sondern über {@link #forEachColumn(Point, Consumer)}.
+     */
     public abstract void generate(GenerationUnit unit, Point start);
 
     public static Obstacle getRandomObstacle() {
         return obstacles.get(ThreadLocalRandom.current().nextInt(obstacles.size()));
     }
+
+    protected static void forEachColumn(Point start, Consumer<Point> callback) {
+        GeneratorUtils.foreachXZ(start, start.add(15, 0, LENGTH - 1), callback);
+    }
+
+    protected static int relX(Point point, Point start) {
+        return point.blockX() - start.blockX();
+    }
+
+    protected static int relZ(Point point, Point start) {
+        return point.blockZ() - start.blockZ();
+    }
+
+    protected static Random seededRandom(Point start) {
+        return new Random(start.blockX() * 341873128712L + start.blockZ() * 132897987541L);
+    }
 }

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/PowderSnowField.java

@@ -0,0 +1,46 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import de.articdive.jnoise.JNoise;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * Verschneites Feld voller Pulverschnee-Verwehungen: Sie liegen auf dem Boden
+ * statt darunter — man watet stark gebremst hindurch, bleibt aber nie stecken
+ * (aus einer Grube käme man ohne Lederstiefel nicht mehr heraus).
+ * Die geschwungene Packeis-Spur ist schnell, aber rutschig — und selbst dort
+ * lauern vereinzelte Verwehungen.
+ */
+class PowderSnowField extends Obstacle {
+    private final JNoise drifts = JNoise.newBuilder()
+        .fastSimplex()
+        .setFrequency(0.14)
+        .build();
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            int z = relZ(point, start);
+            int laneX = 7 + (int) Math.round(3 * Math.sin(z * Math.PI / 7.5));
+            boolean onLane = relX(point, start) == laneX || relX(point, start) == laneX + 1;
+            double noise = this.drifts.getNoise(point.blockX(), point.blockZ());
+            boolean drift = z >= 2 && z <= 13 && noise > (onLane ? 0.45 : 0.0);
+
+            unit.modifier().setBlock(point.withY(start.blockY()), onLane ? Block.PACKED_ICE : Block.SNOW_BLOCK);
+
+            if(drift) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), Block.POWDER_SNOW);
+                if(noise > 0.6) {
+                    unit.modifier().setBlock(point.withY(start.blockY() + 2), Block.POWDER_SNOW);
+                }
+            } else if(!onLane && rnd.nextInt(6) == 0) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), Block.SNOW.withProperty("layers", "1"));
+            }
+        });
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/SandDunes.java

@@ -0,0 +1,44 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import de.articdive.jnoise.JNoise;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * Wüstendünen: Sanfte Sandhügel kosten beim Rauflaufen Sprungkraft und Tempo,
+ * vertrocknete Büsche krönen die Kämme. An den Chunk-Rändern flacht das Feld ab.
+ */
+class SandDunes extends Obstacle {
+    private final JNoise dunes = JNoise.newBuilder()
+        .fastSimplex()
+        .setFrequency(0.08)
+        .build();
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            double taper = -1.25 * Math.cos(relZ(point, start) * Math.PI / 7.5) + 1.25;
+            double noise = (this.dunes.getNoise(point.blockX(), point.blockZ()) + 1) / 2;
+            int top = start.blockY() + (int) Math.round(noise * taper);
+
+            for(int y = start.blockY() - 1; y < top; y++) {
+                unit.modifier().setBlock(point.withY(y), Block.SANDSTONE);
+            }
+            unit.modifier().setBlock(point.withY(top), Block.SAND);
+
+            if(top > start.blockY() + 1 && rnd.nextInt(14) == 0) {
+                unit.modifier().setBlock(point.withY(top + 1), Block.DEAD_BUSH);
+            } else if(top == start.blockY() && relZ(point, start) >= 2 && relZ(point, start) <= 13 && rnd.nextInt(22) == 0) {
+                int cactusHeight = 1 + rnd.nextInt(2);
+                for(int y = 1; y <= cactusHeight; y++) {
+                    unit.modifier().setBlock(point.withY(top + y), Block.CACTUS);
+                }
+            }
+        });
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/SlimePatches.java

@@ -0,0 +1,34 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import de.articdive.jnoise.JNoise;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * Schleimmorast: Der Großteil des Bodens ist Slime — bremst stark und lässt
+ * Springer unkontrolliert abprallen. Nur schmale Moos-Inseln bieten Halt.
+ */
+class SlimePatches extends Obstacle {
+    private final JNoise blobs = JNoise.newBuilder()
+        .fastSimplex()
+        .setFrequency(0.18)
+        .build();
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            int z = relZ(point, start);
+            boolean slime = z >= 1 && z <= 14 && this.blobs.getNoise(point.blockX(), point.blockZ()) > -0.2;
+            unit.modifier().setBlock(point.withY(start.blockY()), slime ? Block.SLIME_BLOCK : Block.MOSS_BLOCK);
+
+            if(!slime && z >= 2 && z <= 13 && rnd.nextInt(18) == 0) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), Block.AZALEA);
+            }
+        });
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/WallSlalom.java

@@ -0,0 +1,42 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * Mauer-Slalom: Steinmauern sind zu hoch zum Überspringen, die Durchgänge
+ * liegen abwechselnd links und rechts — volle Breite Zickzack.
+ */
+class WallSlalom extends Obstacle {
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point ->
+            unit.modifier().setBlock(point.withY(start.blockY()), rnd.nextInt(4) == 0 ? Block.ANDESITE : Block.STONE));
+
+        int[] rows = {4, 8, 12};
+        for(int i = 0; i < rows.length; i++) {
+            int gapStart = i % 2 == 0 ? 1 + rnd.nextInt(3) : 10 + rnd.nextInt(3);
+
+            boolean[] hasWall = new boolean[16];
+            for(int x = 0; x < 16; x++) {
+                hasWall[x] = x < gapStart || x >= gapStart + 2;
+            }
+
+            for(int x = 0; x < 16; x++) {
+                if(!hasWall[x]) continue;
+                boolean westConnected = x > 0 && hasWall[x - 1];
+                boolean eastConnected = x < 15 && hasWall[x + 1];
+                Block wall = Block.STONE_BRICK_WALL
+                    .withProperty("west", westConnected ? "low" : "none")
+                    .withProperty("east", eastConnected ? "low" : "none")
+                    .withProperty("up", String.valueOf(!westConnected || !eastConnected || x % 4 == 0));
+                unit.modifier().setBlock(start.add(x, 1, rows[i]), wall);
+            }
+        }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/playerRace/obstacles/WaterChannel.java

@@ -0,0 +1,41 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.obstacles;
+
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+
+import java.util.Random;
+
+/**
+ * Breiter Wassergraben mit schmalen Sandufern: Fast der ganze Chunk muss
+ * durchschwommen werden, nur vereinzelte Seerosenblätter helfen Mutigen.
+ */
+class WaterChannel extends Obstacle {
+    private static final int[] DEPTHS = {0, 1, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 0, 0};
+
+    @Override
+    public void generate(GenerationUnit unit, Point start) {
+        Random rnd = seededRandom(start);
+
+        forEachColumn(start, point -> {
+            int depth = DEPTHS[relZ(point, start)];
+            if(depth == 0) {
+                unit.modifier().setBlock(point.withY(start.blockY()), rnd.nextInt(3) == 0 ? Block.SMOOTH_SANDSTONE : Block.SAND);
+                return;
+            }
+
+            Block bottom = rnd.nextInt(5) == 0 ? Block.DARK_PRISMARINE : Block.PRISMARINE;
+            unit.modifier().setBlock(point.withY(start.blockY() - depth), bottom);
+            for(int y = start.blockY() - depth + 1; y <= start.blockY(); y++) {
+                unit.modifier().setBlock(point.withY(y), Block.WATER);
+            }
+
+            if(depth >= 2 && rnd.nextInt(4) == 0) {
+                unit.modifier().setBlock(point.withY(start.blockY() - depth + 1), Block.SEAGRASS);
+            }
+            if(rnd.nextInt(20) == 0) {
+                unit.modifier().setBlock(point.withY(start.blockY() + 1), Block.LILY_PAD);
+            }
+        });
+    }
+}