diff --git a/library/objects.json b/library/objects.json
index 44c8208..9be9547 100644
--- a/library/objects.json
+++ b/library/objects.json
@@ -13,6 +13,9 @@
     "boulder_small":    { "poly": 96,  "collision": { "shape": "sphere",   "radius": 0.8 } },
     "tree_pine":        { "poly": 180, "collision": { "shape": "cylinder", "radius": 0.4, "height": 12.0 } },
     "bush_small":       { "poly": 64,  "collision": { "shape": "sphere",   "radius": 0.8 } },
-    "fass":              { "poly": 128, "collision": { "shape": "cylinder", "radius": 0.31, "height": 0.88 } }
+    "fass":              { "poly": 128, "collision": { "shape": "cylinder", "radius": 0.31, "height": 0.88 } },
+    "bruecke_holz":      { "poly": 228, "collision": { "shape": "compound", "parts": [{ "shape": "box", "pos": [0, 0.85, 0], "size": [2, 0.3, 3] }, { "shape": "box", "pos": [0, 0.361, -2.806], "size": [2, 0.3, 2.89], "rot_deg": [21.8, 0, 0] }, { "shape": "box", "pos": [0, 0.361, 2.806], "size": [2, 0.3, 2.89], "rot_deg": [-21.8, 0, 0] }, { "shape": "box", "pos": [-0.93, 1.5, 0], "size": [0.14, 0.12, 3] }, { "shape": "box", "pos": [-0.93, 0.964, -2.564], "size": [0.14, 0.12, 2.69], "rot_deg": [21.8, 0, 0] }, { "shape": "box", "pos": [-0.93, 0.964, 2.564], "size": [0.14, 0.12, 2.69], "rot_deg": [-21.8, 0, 0] }, { "shape": "box", "pos": [0.93, 1.5, 0], "size": [0.14, 0.12, 3] }, { "shape": "box", "pos": [0.93, 0.964, -2.564], "size": [0.14, 0.12, 2.69], "rot_deg": [21.8, 0, 0] }, { "shape": "box", "pos": [0.93, 0.964, 2.564], "size": [0.14, 0.12, 2.69], "rot_deg": [-21.8, 0, 0] }] } },
+    "hoehleneingang":    { "poly": 204, "collision": { "shape": "compound", "parts": [{ "shape": "box", "pos": [-1.8, 1.6, 0], "size": [1.4, 3.2, 4] }, { "shape": "box", "pos": [1.8, 1.6, 0], "size": [1.4, 3.2, 4] }, { "shape": "box", "pos": [0, 2.8, 0], "size": [5, 0.8, 4] }, { "shape": "box", "pos": [0, 1.2, 1.8], "size": [2.2, 2.4, 0.4] }] } },
+    "felsbogen":         { "poly": 156, "collision": { "shape": "compound", "parts": [{ "shape": "box", "pos": [-1.9, 1.3, 0], "size": [1.2, 2.6, 2.4] }, { "shape": "box", "pos": [1.9, 1.3, 0], "size": [1.2, 2.6, 2.4] }, { "shape": "box", "pos": [0, 3.1, 0], "size": [5, 1, 2.4] }] } }
   }
 }
diff --git a/library/thumbs/bruecke_holz.png b/library/thumbs/bruecke_holz.png
new file mode 100644
index 0000000..05e259a
Binary files /dev/null and b/library/thumbs/bruecke_holz.png differ
diff --git a/library/thumbs/felsbogen.png b/library/thumbs/felsbogen.png
new file mode 100644
index 0000000..4011678
Binary files /dev/null and b/library/thumbs/felsbogen.png differ
diff --git a/library/thumbs/hoehleneingang.png b/library/thumbs/hoehleneingang.png
new file mode 100644
index 0000000..a3dde38
Binary files /dev/null and b/library/thumbs/hoehleneingang.png differ
diff --git a/src/editor/library_browser.gd b/src/editor/library_browser.gd
index 3da8372..ffbf9bd 100644
--- a/src/editor/library_browser.gd
+++ b/src/editor/library_browser.gd
@@ -22,6 +22,9 @@ const NAMES := {
 	"boulder_small": "Kleiner Felsen",
 	"tree_pine": "Nadelbaum",
 	"bush_small": "Strauch",
+	"bruecke_holz": "Brücke (Holz)",
+	"hoehleneingang": "Höhleneingang",
+	"felsbogen": "Felsbogen",
 }
 
 ## Gruppen für den Bibliothek-Browser (Anzeige-Reihenfolge = Reihenfolge hier).
@@ -34,7 +37,8 @@ const GROUP_LABELS := {
 }
 const GROUP_IDS := {
 	"kisten": ["crate_wood", "crate_metal", "barrier_sandbag", "wall_concrete"],
-	"bauwerke": ["bunker_concrete", "watchtower_wood", "fence_metal"],
+	"bauwerke": ["bunker_concrete", "watchtower_wood", "fence_metal",
+		"bruecke_holz", "hoehleneingang", "felsbogen"],
 	"natur": ["tree_pine", "bush_small", "rock_large", "boulder_small"],
 }
 
diff --git a/src/viewport/map_view_builder.gd b/src/viewport/map_view_builder.gd
index 28acf42..2320253 100644
--- a/src/viewport/map_view_builder.gd
+++ b/src/viewport/map_view_builder.gd
@@ -195,7 +195,7 @@ func _build_objects(objects: Array, manifest: Dictionary) -> void:
 		marker.add_child(mi)
 		var half := (mesh.get_aabb().size * 0.5) as Vector3
 		marker.set_meta("pick_radius", half.length() + maxf(0.6, half.y * 0.25))
-		marker.set_meta("half_height", MeshShapes.half_height(mesh))
+		marker.set_meta("half_height", MeshShapes.center_height(mesh))
 		object_markers.append(marker)
 		add_child(marker)
 
diff --git a/src/viewport/mesh_shapes.gd b/src/viewport/mesh_shapes.gd
index f5cdeb5..32085f0 100644
--- a/src/viewport/mesh_shapes.gd
+++ b/src/viewport/mesh_shapes.gd
@@ -7,6 +7,7 @@ class_name MeshShapes
 const SHAPE_BOX := "box"
 const SHAPE_SPHERE := "sphere"
 const SHAPE_CYLINDER := "cylinder"
+const SHAPE_COMPOUND := "compound"
 
 
 static func make_placeholder(shape: String, col: Dictionary, scale: float) -> Mesh:
@@ -23,6 +24,33 @@ static func make_placeholder(shape: String, col: Dictionary, scale: float) -> Me
 			c.bottom_radius = c.top_radius
 			c.height = maxf(0.01, float(col.get("height", 1.0)) * scale)
 			return c
+		SHAPE_COMPOUND:
+			# Struktur-Objekte (t_d8be9ed7): EIN Mesh aus allen Verbund-Teilen,
+			# gebacken in Fußpunkt-Koordinaten (Teil-pos = Versatz vom Fußpunkt,
+			# rot_deg = Euler-Grad) — Rampe/Durchgänge also sichtbar wie die
+			# echte Kollision. half_height() liefert dafür 0 (schon gebacken).
+			var st := SurfaceTool.new()
+			st.begin(Mesh.PRIMITIVE_TRIANGLES)
+			st.set_smooth_group(-1)
+			for teil_v in col.get("parts", []):
+				var teil: Dictionary = teil_v if teil_v is Dictionary else {}
+				var teil_mesh := make_placeholder(str(teil.get("shape", "box")), teil, scale)
+				if teil_mesh == null:
+					continue
+				var off: Array = teil.get("pos", [0.0, 0.0, 0.0])
+				var rot: Array = teil.get("rot_deg", [0.0, 0.0, 0.0])
+				var xf := Transform3D(
+					Basis.from_euler(Vector3(deg_to_rad(float(rot[0])), deg_to_rad(float(rot[1])), deg_to_rad(float(rot[2])))),
+					Vector3(float(off[0]), float(off[1]), float(off[2])) * scale)
+				# PrimitiveMesh → Roht_arrays (MeshDataTool bräuchte ArrayMesh).
+				var arrays: Array = teil_mesh.surface_get_arrays(0)
+				var verts: PackedVector3Array = arrays[Mesh.ARRAY_VERTEX]
+				var norms: PackedVector3Array = arrays[Mesh.ARRAY_NORMAL]
+				var idx: PackedInt32Array = arrays[Mesh.ARRAY_INDEX]
+				for ii in idx:
+					st.set_normal(xf.basis * norms[ii])
+					st.add_vertex(xf * verts[ii])
+			return st.commit()
 		_:
 			var b := BoxMesh.new()
 			var size: Array = col.get("size", [1.0, 1.0, 1.0])
@@ -32,6 +60,7 @@ static func make_placeholder(shape: String, col: Dictionary, scale: float) -> Me
 
 
 ## Halbe Höhe des Meshes über dem Fußpunkt (Mesh-Ursprung = Objekt-Fuß).
+## Compound-ArrayMeshes sind bereits in Fußpunkt-Koordinaten gebacken → 0.
 static func half_height(mesh: Mesh) -> float:
 	if mesh is BoxMesh:
 		return (mesh as BoxMesh).size.y * 0.5
@@ -39,4 +68,12 @@ static func half_height(mesh: Mesh) -> float:
 		return (mesh as CylinderMesh).height * 0.5
 	if mesh is SphereMesh:
 		return (mesh as SphereMesh).radius
-	return 0.0
\ No newline at end of file
+	return 0.0
+
+
+## Höhe des Mesh-MITTELPUNKTS über dem Fußpunkt — für das Drehzentrum der
+## Objekt-Auswahl. Bei Grundformen = half_height (Mesh ist zentriert); beim
+## Compound-ArrayMesh = AABB-Mitte (schon in Fußpunkt-Koordinaten gebacken).
+static func center_height(mesh: Mesh) -> float:
+	var aabb := mesh.get_aabb()
+	return half_height(mesh) + aabb.position.y + aabb.size.y * 0.5
\ No newline at end of file
diff --git a/tests/test_library.gd b/tests/test_library.gd
index aff6bdd..c046b91 100644
--- a/tests/test_library.gd
+++ b/tests/test_library.gd
@@ -52,7 +52,7 @@ func _test_manifest_load() -> void:
 	var manifest := _load_manifest()
 	_check(not manifest.is_empty(), "Manifest lädt und ist ein Objekt")
 	var lib: Dictionary = manifest.get("objects", {})
-	_check(lib.size() == 12, "Katalog hat die 12 etablierten Objekte (ist %d)" % lib.size())
+	_check(lib.size() == 15, "Katalog hat die 15 etablierten Objekte (ist %d)" % lib.size())
 	var all_ok := true
 	for oid in lib.keys():
 		var entry: Dictionary = lib[oid]
@@ -254,7 +254,7 @@ func _test_crud_undo_all_objects() -> void:
 			all_ok = false
 		if first:
 			first = false
-	_check(all_ok, "alle 11 Objekte: setzen/drehen/verschieben/löschen je mit Undo+Redo sauber")
+	_check(all_ok, "alle %d Objekte: setzen/drehen/verschieben/löschen je mit Undo+Redo sauber" % lib.size())
 
 
 # -------------------------------------------------------- svmap-Roundtrip ----