fix: preserve zero denoise metadata

metahub_save_3d_node.py

@@ -313,6 +313,7 @@ def _build_metadata(
     loras = extracted.get("lora_list") or utils.extract_loras_from_workflow(workflow_json)
     model_name = extracted.get("model_name") or ""
     steps = int(extracted.get("steps") or 0)
+    denoise = extracted.get("denoise")
     elapsed = time.time() - generation_time_override if generation_time_override and generation_time_override > 0 else 0.0
     generation_time_ms = int(elapsed * 1000) if elapsed > 0 else None
     gpu = utils.collect_gpu_metrics()
@@ -330,7 +331,7 @@ def _build_metadata(
         "model_name": model_name,
         "model_hash": utils.calculate_model_hash(model_name, model_type="checkpoint") if model_name else "",
         "vae_name": extracted.get("vae_name") or "",
-        "denoise": float(extracted.get("denoise") or 1.0),
+        "denoise": float(denoise) if denoise is not None else 1.0,
         "width": 0,
         "height": 0,
         "lora_list": loras,

tests/test_metahub_save_3d_node.py

@@ -92,6 +92,31 @@ def test_texture_without_usable_uvs_is_not_reported_as_embedded(tmp_path):
     assert "textures" not in gltf
 
 
+def test_build_metadata_preserves_zero_denoise(monkeypatch):
+    class FakeExtractor:
+        def __init__(self, _prompt):
+            pass
+
+        def extract(self, save_node_id):
+            assert save_node_id == "3"
+            return {"denoise": 0.0, "lora_list": []}, set()
+
+    monkeypatch.setattr(node3d, "WorkflowExtractor", FakeExtractor)
+    monkeypatch.setattr(node3d.utils, "get_workflow_json", lambda _info: {})
+    monkeypatch.setattr(node3d.utils, "ensure_prompt_in_workflow", lambda workflow, _prompt: workflow)
+    monkeypatch.setattr(node3d.utils, "ensure_metahub_save_node", lambda *args, **kwargs: None)
+    monkeypatch.setattr(node3d.utils, "extract_loras_from_workflow", lambda _workflow: [])
+    monkeypatch.setattr(node3d.utils, "collect_gpu_metrics", lambda: {})
+    monkeypatch.setattr(node3d.utils, "collect_version_info", lambda: {})
+    monkeypatch.setattr(node3d.utils, "build_metadata_sources", lambda *args: {})
+    monkeypatch.setattr(node3d.utils, "extract_workflow_attribution", lambda *args: {})
+    monkeypatch.setattr(node3d.utils, "build_imh_metadata", lambda params, _workflow: params)
+
+    metadata = node3d._build_metadata({}, {}, "3", "", "", "", None)
+
+    assert metadata["denoise"] == 0.0
+
+
 def test_textured_unlit_mesh_preserves_unlit_and_transparency(tmp_path):
     mesh = _mesh()
     mesh.unlit = True