diff --git a/library/objects.json b/library/objects.json
index d73f04d..04bc69a 100644
--- a/library/objects.json
+++ b/library/objects.json
@@ -1,6 +1,6 @@
 {
   "library_version": 1,
-  "note": "Editor-Kopie der offiziellen Bibliotheks-Registry (geschlossener Baukasten, PLAN Entscheidung 20). Quelle: scopedvr-match-server library/objects.json — beim Registrieren neuer Objekte DORT zuerst eintragen und hier synchron ziehen. 'poly' = Referenz-Dreieckszahl (Budget-Rechnung, map_format.md §4 V8); 'collision' = Approximation für Platzhalter-Darstellung im Viewport.",
+  "note": "Server-Registry der offiziellen Asset-Bibliothek (geschlossener Baukasten, PLAN Entscheidung 20). 'poly' = Referenz-Dreieckszahl des Client-Meshes (Budget-Rechnung, map_format.md §4 V8); 'collision' = Server-Approximation (Nur Physik, headless). Die Bibliothek waechst mit der Client-Asset-Liste — IDs sind IMMER zuerst HIER registriert, bevor Maps sie referenzieren.",
   "objects": {
     "barracks_001": {
       "poly": 1139,
@@ -16,6 +16,188 @@
       "kategorie": "buildings",
       "name_de": "Kaserne"
     },
+    "barrel_001": {
+      "poly": 184,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.617,
+          0.85,
+          0.617
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/barrel_001.glb",
+      "kategorie": "props",
+      "name_de": "Fass 01"
+    },
+    "barrel_002": {
+      "poly": 184,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.617,
+          0.85,
+          0.617
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/barrel_002.glb",
+      "kategorie": "props",
+      "name_de": "Fass 02"
+    },
+    "barrel_003": {
+      "poly": 184,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.617,
+          0.85,
+          0.617
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/barrel_003.glb",
+      "kategorie": "props",
+      "name_de": "Fass 03"
+    },
+    "barrel_004": {
+      "poly": 184,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.617,
+          0.85,
+          0.617
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/barrel_004.glb",
+      "kategorie": "props",
+      "name_de": "Fass 04"
+    },
+    "barrel_005": {
+      "poly": 184,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.617,
+          0.85,
+          0.617
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/barrel_005.glb",
+      "kategorie": "props",
+      "name_de": "Fass 05"
+    },
+    "barrel_006": {
+      "poly": 184,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.617,
+          0.85,
+          0.617
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/barrel_006.glb",
+      "kategorie": "props",
+      "name_de": "Fass 06"
+    },
+    "barrel_007": {
+      "poly": 184,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.617,
+          0.85,
+          0.617
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/barrel_007.glb",
+      "kategorie": "props",
+      "name_de": "Fass 07"
+    },
+    "barrel_008": {
+      "poly": 184,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.617,
+          0.85,
+          0.617
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/barrel_008.glb",
+      "kategorie": "props",
+      "name_de": "Fass 08"
+    },
+    "barrel_009": {
+      "poly": 184,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.617,
+          0.85,
+          0.617
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/barrel_009.glb",
+      "kategorie": "props",
+      "name_de": "Fass 09"
+    },
+    "barrel_010": {
+      "poly": 184,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.617,
+          0.85,
+          0.617
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/barrel_010.glb",
+      "kategorie": "props",
+      "name_de": "Fass 10"
+    },
+    "barrel_011": {
+      "poly": 192,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.183,
+          2.578,
+          1.183
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/barrel_011.glb",
+      "kategorie": "props",
+      "name_de": "Fass 11"
+    },
+    "barrel_012": {
+      "poly": 296,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.605,
+          0.948,
+          1.052
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/barrel_012.glb",
+      "kategorie": "props",
+      "name_de": "Fass 12"
+    },
+    "barrel_013": {
+      "poly": 126,
+      "collision": {
+        "shape": "box",
+        "size": [
+          2.297,
+          1.409,
+          1.183
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/barrel_013.glb",
+      "kategorie": "props",
+      "name_de": "Fass 13"
+    },
     "barrier_001": {
       "poly": 72,
       "collision": {
@@ -390,6 +572,440 @@
         "radius": 0.8
       }
     },
+    "box_001": {
+      "poly": 604,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.411,
+          0.784,
+          0.947
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_001.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 01"
+    },
+    "box_002": {
+      "poly": 604,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.411,
+          0.784,
+          0.947
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_002.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 02"
+    },
+    "box_003": {
+      "poly": 604,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.411,
+          0.784,
+          0.947
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_003.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 03"
+    },
+    "box_004": {
+      "poly": 200,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.568,
+          0.684,
+          0.684
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_004.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 04"
+    },
+    "box_005": {
+      "poly": 200,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.568,
+          0.684,
+          0.684
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_005.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 05"
+    },
+    "box_006": {
+      "poly": 104,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.21,
+          0.334,
+          0.452
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_006.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 06"
+    },
+    "box_007": {
+      "poly": 104,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.21,
+          0.334,
+          0.452
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_007.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 07"
+    },
+    "box_008": {
+      "poly": 104,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.21,
+          0.334,
+          0.452
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_008.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 08"
+    },
+    "box_009": {
+      "poly": 104,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.646,
+          0.334,
+          0.451
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_009.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 09"
+    },
+    "box_010": {
+      "poly": 104,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.646,
+          0.334,
+          0.451
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_010.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 10"
+    },
+    "box_011": {
+      "poly": 104,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.646,
+          0.334,
+          0.451
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_011.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 11"
+    },
+    "box_012": {
+      "poly": 120,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.623,
+          0.623,
+          0.623
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_012.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 12"
+    },
+    "box_013": {
+      "poly": 120,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.623,
+          0.623,
+          0.623
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_013.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 13"
+    },
+    "box_014": {
+      "poly": 108,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.623,
+          0.623,
+          0.623
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_014.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 14"
+    },
+    "box_015": {
+      "poly": 108,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.623,
+          0.623,
+          0.623
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_015.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 15"
+    },
+    "box_016": {
+      "poly": 84,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.623,
+          0.623,
+          0.623
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_016.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 16"
+    },
+    "box_017": {
+      "poly": 84,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.623,
+          0.623,
+          0.623
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_017.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 17"
+    },
+    "box_018": {
+      "poly": 84,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.156,
+          0.623,
+          0.623
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_018.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 18"
+    },
+    "box_019": {
+      "poly": 84,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.156,
+          0.623,
+          0.623
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_019.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 19"
+    },
+    "box_020": {
+      "poly": 195,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.438,
+          1.321,
+          1.439
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_020.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 20"
+    },
+    "box_021": {
+      "poly": 195,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.438,
+          1.321,
+          1.439
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_021.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 21"
+    },
+    "box_022": {
+      "poly": 195,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.438,
+          1.321,
+          1.439
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_022.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 22"
+    },
+    "box_023": {
+      "poly": 195,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.438,
+          1.321,
+          1.439
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_023.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 23"
+    },
+    "box_024": {
+      "poly": 350,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.438,
+          1.421,
+          1.439
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_024.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 24"
+    },
+    "box_025": {
+      "poly": 350,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.438,
+          1.421,
+          1.439
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_025.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 25"
+    },
+    "box_026": {
+      "poly": 594,
+      "collision": {
+        "shape": "box",
+        "size": [
+          3.462,
+          1.489,
+          3.305
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_026.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 26"
+    },
+    "box_027": {
+      "poly": 739,
+      "collision": {
+        "shape": "box",
+        "size": [
+          2.641,
+          2.376,
+          2.54
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_027.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 27"
+    },
+    "box_028": {
+      "poly": 594,
+      "collision": {
+        "shape": "box",
+        "size": [
+          3.462,
+          1.489,
+          3.305
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_028.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 28"
+    },
+    "box_029": {
+      "poly": 739,
+      "collision": {
+        "shape": "box",
+        "size": [
+          2.641,
+          2.376,
+          2.54
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_029.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 29"
+    },
+    "box_030": {
+      "poly": 739,
+      "collision": {
+        "shape": "box",
+        "size": [
+          2.641,
+          2.376,
+          2.54
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_030.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 30"
+    },
+    "box_031": {
+      "poly": 594,
+      "collision": {
+        "shape": "box",
+        "size": [
+          3.462,
+          1.489,
+          3.305
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/box_031.glb",
+      "kategorie": "props",
+      "name_de": "Kiste 31"
+    },
     "bruecke_holz": {
       "poly": 228,
       "collision": {
@@ -2351,6 +2967,103 @@
         "radius": 1.5
       }
     },
+    "shell_001": {
+      "poly": 320,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.456,
+          1.368,
+          0.456
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/shell_001.glb",
+      "kategorie": "props",
+      "name_de": "Granate 01"
+    },
+    "shell_002": {
+      "poly": 184,
+      "collision": {
+        "shape": "none"
+      },
+      "glb": "res://assets/objekte/military_desert/props/shell_002.glb",
+      "kategorie": "props",
+      "name_de": "Granate 02"
+    },
+    "shell_003": {
+      "poly": 186,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.177,
+          1.107,
+          0.177
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/shell_003.glb",
+      "kategorie": "props",
+      "name_de": "Granate 03"
+    },
+    "shell_004": {
+      "poly": 186,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.177,
+          1.107,
+          0.177
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/shell_004.glb",
+      "kategorie": "props",
+      "name_de": "Granate 04"
+    },
+    "shell_005": {
+      "poly": 212,
+      "collision": {
+        "shape": "none"
+      },
+      "glb": "res://assets/objekte/military_desert/props/shell_005.glb",
+      "kategorie": "props",
+      "name_de": "Granate 05"
+    },
+    "shell_006": {
+      "poly": 88,
+      "collision": {
+        "shape": "none"
+      },
+      "glb": "res://assets/objekte/military_desert/props/shell_006.glb",
+      "kategorie": "props",
+      "name_de": "Granate 06"
+    },
+    "shell_007": {
+      "poly": 94,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.963,
+          0.488,
+          0.488
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/shell_007.glb",
+      "kategorie": "props",
+      "name_de": "Granate 07"
+    },
+    "shell_008": {
+      "poly": 94,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.963,
+          0.488,
+          0.488
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/shell_008.glb",
+      "kategorie": "props",
+      "name_de": "Granate 08"
+    },
     "stein_kiesel_1": {
       "poly": 136,
       "collision": {
@@ -2755,6 +3468,104 @@
       "kategorie": "buildings",
       "name_de": "Zelt 14"
     },
+    "training_item_001": {
+      "poly": 518,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.156,
+          1.108,
+          1.307
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/training_item_001.glb",
+      "kategorie": "props",
+      "name_de": "Trainingsziel 01"
+    },
+    "training_item_002": {
+      "poly": 778,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.529,
+          1.279,
+          0.962
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/training_item_002.glb",
+      "kategorie": "props",
+      "name_de": "Trainingsziel 02"
+    },
+    "training_item_003": {
+      "poly": 1996,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.393,
+          1.416,
+          1.008
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/training_item_003.glb",
+      "kategorie": "props",
+      "name_de": "Trainingsziel 03"
+    },
+    "training_item_004": {
+      "poly": 1320,
+      "collision": {
+        "shape": "box",
+        "size": [
+          0.81,
+          1.509,
+          0.926
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/training_item_004.glb",
+      "kategorie": "props",
+      "name_de": "Trainingsziel 04"
+    },
+    "training_item_005": {
+      "poly": 392,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.731,
+          1.264,
+          1.894
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/training_item_005.glb",
+      "kategorie": "props",
+      "name_de": "Trainingsziel 05"
+    },
+    "training_item_006": {
+      "poly": 304,
+      "collision": {
+        "shape": "box",
+        "size": [
+          1.731,
+          1.53,
+          1.87
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/training_item_006.glb",
+      "kategorie": "props",
+      "name_de": "Trainingsziel 06"
+    },
+    "training_item_007": {
+      "poly": 628,
+      "collision": {
+        "shape": "box",
+        "size": [
+          2.562,
+          2.818,
+          3.204
+        ]
+      },
+      "glb": "res://assets/objekte/military_desert/props/training_item_007.glb",
+      "kategorie": "props",
+      "name_de": "Trainingsziel 07"
+    },
     "tree_pine": {
       "poly": 180,
       "collision": {
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diff --git a/tests/probe_d4_mapbuilder.gd b/tests/probe_d4_mapbuilder.gd
new file mode 100644
index 0000000..984fe54
--- /dev/null
+++ b/tests/probe_d4_mapbuilder.gd
@@ -0,0 +1,82 @@
+extends SceneTree
+## D4-Beweis (t_691b51ce): Map-Builder platziert 3 Military-Props auf dem Boden
+## und zeigt ihre Kollisionsboxen (Drahtgitter aus registry `collision.size`).
+##
+##   xvfb-run -a /opt/data/home/bin/godot4 --rendering-driver opengl3 --path . \
+##     --resolution 1600x900 -s res://tests/probe_d4_mapbuilder.gd
+##
+## Ausgabe: /tmp/d4_mapbuilder.png + Prüfzeilen (Modus == GLB, Fußpunkt y=0)
+
+const MapDocument := preload("res://src/svmap/map_document.gd")
+
+const PLATZ := [
+	{"id": "barrel_001", "pos": [-2.2, 0.0, 0.0], "rot_y_deg": 0.0},
+	{"id": "box_020", "pos": [0.6, 0.0, 0.6], "rot_y_deg": 25.0},
+	{"id": "training_item_005", "pos": [3.6, 0.0, -0.6], "rot_y_deg": 180.0},
+]
+
+
+func _initialize() -> void:
+	var manifest: Dictionary = JSON.parse_string(FileAccess.get_file_as_string("res://library/objects.json"))
+	var doc: Dictionary = MapDocument.create_new("D4-Beweis", 256.0, "mittag")
+	doc["objects"] = PLATZ
+
+	var bauer: Node3D = load("res://src/viewport/map_view_builder.gd").new()
+	root.add_child(bauer)
+	await process_frame
+	bauer.rebuild(doc, manifest)
+
+	var lib: Dictionary = manifest.get("objects", {})
+	var fehler: Array = []
+	for i in PLATZ.size():
+		var marker: Node3D = bauer.object_markers[i]
+		if marker == null:
+			fehler.append("%s: kein Marker" % PLATZ[i]["id"])
+			continue
+		var oid := str(PLATZ[i]["id"])
+		var entry: Dictionary = lib.get(oid, {})
+		if entry.is_empty():
+			fehler.append("%s: nicht in der Bibliothek" % oid)
+			continue
+		var col: Dictionary = entry.get("collision", {})
+		var groesse: Array = col.get("size", [0.0, 0.0, 0.0])
+		# Kollisionsbox als Drahtgitter (Fußpunkt: Unterkante y=0).
+		var box := MeshInstance3D.new()
+		var bm := BoxMesh.new()
+		bm.size = Vector3(float(groesse[0]), float(groesse[1]), float(groesse[2])) + Vector3(0.01, 0.01, 0.01)
+		box.mesh = bm
+		var mat := StandardMaterial3D.new()
+		mat.shading_mode = BaseMaterial3D.SHADING_MODE_UNSHADED
+		mat.albedo_color = Color(0.15, 1.0, 0.35, 0.28)
+		mat.transparency = BaseMaterial3D.TRANSPARENCY_ALPHA
+		mat.cull_mode = BaseMaterial3D.CULL_DISABLED
+		mat.wireframe = true
+		box.material_override = mat
+		box.position = Vector3(0.0, float(groesse[1]) * 0.5, 0.0)
+		marker.add_child(box)
+		var echt := bool(marker.get_meta("glb"))
+		var mi := marker.get_child(0) as MeshInstance3D
+		var mesh_aabb := mi.mesh.get_aabb() if (mi != null and mi.mesh != null) else AABB()
+		print("%s: ehctesGLB=%s  registry=%.3f/%.3f/%.3f  mesh_aabb=%.3f/%.3f/%.3f  mesh_min_y=%.3f"
+				% [oid, str(echt), float(groesse[0]), float(groesse[1]), float(groesse[2]),
+					mesh_aabb.size.x, mesh_aabb.size.y, mesh_aabb.size.z, mesh_aabb.position.y])
+		if not echt:
+			fehler.append("%s: rendert nur den Platzhalter (GLB fehlt)" % oid)
+
+	var cam := Camera3D.new()
+	cam.fov = 45.0
+	cam.position = Vector3(4.5, 3.2, 7.5)
+	root.add_child(cam)
+	await process_frame
+	cam.look_at(Vector3(0.6, 0.7, 0.0), Vector3.UP)
+	cam.current = true
+	cam.make_current()
+
+	await process_frame
+	await process_frame
+	await RenderingServer.frame_post_draw
+	root.get_texture().get_image().save_png("/tmp/d4_mapbuilder.png")
+	for f in fehler:
+		print("  FEHLER: %s" % f)
+	print("PROBE_D4_MAPBUILDER_%s" % ("FAIL" if not fehler.is_empty() else "OK"))
+	quit(1 if not fehler.is_empty() else 0)