diff --git a/blight-game/src/main/java/de/blight/game/animation/AnimationLibrary.java b/blight-game/src/main/java/de/blight/game/animation/AnimationLibrary.java
index dae3098..f6ba3ed 100644
--- a/blight-game/src/main/java/de/blight/game/animation/AnimationLibrary.java
+++ b/blight-game/src/main/java/de/blight/game/animation/AnimationLibrary.java
@@ -9,6 +9,8 @@ import com.jme3.scene.Spatial;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import com.jme3.math.Vector3f;
+
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -115,6 +117,7 @@ public class AnimationLibrary extends BaseAppState {
             return false;
         }
 
+        target = snapRootBoneXZ(target, sc.getArmature());
         ac.addAnimClip(target);
         log.info("[AnimLib] Clip '{}' zu AnimComposer von '{}' hinzugefügt", clipName, model.getName());
         if (clipName.equals("sit_down")) {
@@ -257,6 +260,46 @@ public class AnimationLibrary extends BaseAppState {
         return null;
     }
 
+    /**
+     * Friert X und Z des Root-Knochens (kein Eltern-Joint) auf den Wert von Frame 0 ein.
+     * Y (Höhenachse, JME3 Y-Up) bleibt vollständig erhalten — sit_down / Jump / Bounce laufen korrekt.
+     * Erstellt einen neuen in-memory-Clip; J3O-Dateien bleiben unverändert.
+     */
+    private static AnimClip snapRootBoneXZ(AnimClip clip, Armature armature) {
+        if (clip == null || armature == null) return clip;
+        List<AnimTrack<?>> newTracks = new ArrayList<>();
+        boolean modified = false;
+        for (AnimTrack<?> track : clip.getTracks()) {
+            if (!(track instanceof TransformTrack tt) || !(tt.getTarget() instanceof Joint j)) {
+                newTracks.add(track);
+                continue;
+            }
+            if (j.getParent() != null) {
+                newTracks.add(track);
+                continue;
+            }
+            Vector3f[] translations = tt.getTranslations();
+            if (translations == null || translations.length == 0) {
+                newTracks.add(track);
+                continue;
+            }
+            float f0x = translations[0].x;
+            float f0z = translations[0].z;
+            Vector3f[] snapped = new Vector3f[translations.length];
+            for (int i = 0; i < translations.length; i++) {
+                snapped[i] = new Vector3f(f0x, translations[i].y, f0z);
+            }
+            newTracks.add(new TransformTrack(j, tt.getTimes(), snapped, tt.getRotations(), tt.getScales()));
+            modified = true;
+            log.debug("[AnimLib] '{}': Root-Joint '{}' XZ={},{} eingefroren, Y frei",
+                      clip.getName(), j.getName(), f0x, f0z);
+        }
+        if (!modified) return clip;
+        AnimClip result = new AnimClip(clip.getName());
+        result.setTracks(newTracks.toArray(new AnimTrack[0]));
+        return result;
+    }
+
     /** Loggt alle Tracks eines Clips: Bone-Name, hat Translation (T), Rotation (R), Scale (S). */
     private void dumpClipTracks(com.jme3.anim.AnimClip clip) {
         log.info("[ClipDump] '{}' length={}s tracks={}",