diff --git a/requirements.txt b/requirements.txt
index 26be316f..d1953d29 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -66,4 +66,3 @@ werkzeug==3.1.8
     #   flask
     #   flask-cors
 
-opengeodeweb-microservice==1.*,>=1.1.4
diff --git a/src/opengeodeweb_back/geode_objects/__init__.py b/src/opengeodeweb_back/geode_objects/__init__.py
index d1329a1d..5eb46f65 100644
--- a/src/opengeodeweb_back/geode_objects/__init__.py
+++ b/src/opengeodeweb_back/geode_objects/__init__.py
@@ -31,6 +31,7 @@
 from .geode_cross_section import GeodeCrossSection
 from .geode_implicit_structural_model import GeodeImplicitStructuralModel
 from .geode_implicit_cross_section import GeodeImplicitCrossSection
+from .geode_horizon_stack3d import GeodeHorizonStack3D
 
 geode_objects: dict[GeodeObjectType, type[GeodeObject]] = {
     "VertexSet": GeodeVertexSet,
@@ -58,4 +59,5 @@
     "CrossSection": GeodeCrossSection,
     "ImplicitStructuralModel": GeodeImplicitStructuralModel,
     "ImplicitCrossSection": GeodeImplicitCrossSection,
+    "HorizonStack3D": GeodeHorizonStack3D,
 }
diff --git a/src/opengeodeweb_back/geode_objects/geode_horizon_stack3d.py b/src/opengeodeweb_back/geode_objects/geode_horizon_stack3d.py
new file mode 100644
index 00000000..161bb35b
--- /dev/null
+++ b/src/opengeodeweb_back/geode_objects/geode_horizon_stack3d.py
@@ -0,0 +1,117 @@
+# Standard library imports
+from __future__ import annotations
+from typing import Any
+
+# Third party imports
+import opengeode as og
+import opengeode_geosciences as og_geosciences
+from opengeodeweb_microservice.database.data_types import GeodeModelType
+
+# Local application imports
+from .geode_model import GeodeModel, ComponentRegistry
+
+
+class GeodeHorizonStack3D(GeodeModel):
+    horizon_stack: og_geosciences.HorizonsStack3D
+
+    def __init__(
+        self, horizon_stack: og_geosciences.HorizonsStack3D | None = None
+    ) -> None:
+        self.horizon_stack = (
+            horizon_stack
+            if horizon_stack is not None
+            else og_geosciences.HorizonsStack3D()
+        )
+        super().__init__(self.horizon_stack)
+
+    @classmethod
+    def geode_object_type(cls) -> GeodeModelType:
+        return "HorizonStack3D"
+
+    def native_extension(self) -> str:
+        return self.horizon_stack.native_extension()
+
+    @classmethod
+    def is_3D(cls) -> bool:
+        return True
+
+    @classmethod
+    def is_viewable(cls) -> bool:
+        return False
+
+    def builder(self) -> og_geosciences.HorizonsStackBuilder3D:
+        return og_geosciences.HorizonsStackBuilder3D(self.horizon_stack)
+
+    @classmethod
+    def load(cls, filename: str) -> GeodeHorizonStack3D:
+        return GeodeHorizonStack3D(og_geosciences.load_horizons_stack3D(filename))
+
+    @classmethod
+    def additional_files(cls, filename: str) -> og.AdditionalFiles:
+        return og_geosciences.horizons_stack_additional_files3D(filename)
+
+    @classmethod
+    def is_loadable(cls, filename: str) -> og.Percentage:
+        return og_geosciences.is_horizons_stack_loadable3D(filename)
+
+    @classmethod
+    def input_extensions(cls) -> list[str]:
+        if hasattr(og_geosciences, "HorizonsStackInputFactory3D"):
+            return og_geosciences.HorizonsStackInputFactory3D.list_creators()
+        return []
+
+    @classmethod
+    def output_extensions(cls) -> list[str]:
+        if hasattr(og_geosciences, "HorizonsStackOutputFactory3D"):
+            return og_geosciences.HorizonsStackOutputFactory3D.list_creators()
+        return []
+
+    @classmethod
+    def object_priority(cls, filename: str) -> int:
+        if hasattr(og_geosciences, "horizons_stack_object_priority3D"):
+            return og_geosciences.horizons_stack_object_priority3D(filename)
+        return 0
+
+    def is_saveable(self, filename: str) -> bool:
+        if hasattr(og_geosciences, "is_horizons_stack_saveable3D"):
+            return bool(
+                og_geosciences.is_horizons_stack_saveable3D(
+                    self.horizon_stack, filename
+                )
+            )
+        return True
+
+    def save(self, filename: str) -> list[str]:
+        if hasattr(og_geosciences, "save_horizons_stack3D"):
+            return og_geosciences.save_horizons_stack3D(self.horizon_stack, filename)
+        return []
+
+    def save_viewable(self, filename_without_extension: str) -> str:
+        return ""
+
+    def save_light_viewable(self, filename_without_extension: str) -> str:
+        return ""
+
+    def mesh_components(self) -> ComponentRegistry:
+        return {}
+
+    def collection_components(self) -> ComponentRegistry:
+        return {}
+
+    def boundaries(self, id: og.uuid) -> list[og.ComponentID]:
+        return []
+
+    def internals(self, id: og.uuid) -> list[og.ComponentID]:
+        return []
+
+    def items(self, id: og.uuid) -> list[og.ComponentID]:
+        return []
+
+    def component(self, id: og.uuid) -> og.Component3D:
+        raise NotImplementedError("HorizonStack3D has no mesh components")
+
+    def inspect(self) -> Any:
+        return None
+
+    def validate(self) -> Any:
+        return None
diff --git a/src/opengeodeweb_back/utils_functions.py b/src/opengeodeweb_back/utils_functions.py
index 34e5cf3b..de067853 100644
--- a/src/opengeodeweb_back/utils_functions.py
+++ b/src/opengeodeweb_back/utils_functions.py
@@ -200,18 +200,20 @@ def create_data_folder_from_id(data_id: str) -> str:
 def model_components(
     data_id: str, model: GeodeModel, viewable_file: str
 ) -> dict[str, Any]:
-    vtm_file_path = geode_functions.data_file_path(data_id, viewable_file)
-    tree = ET.parse(vtm_file_path)
-    root = tree.find("vtkMultiBlockDataSet")
-    if root is None:
-        flask.abort(500, "Failed to read viewable file")
-    uuid_to_flat_index = {}
-    current_index = 0
-    assert root is not None
-    for elem in root.iter():
-        if "uuid" in elem.attrib and elem.tag == "DataSet":
-            uuid_to_flat_index[elem.attrib["uuid"]] = current_index
-        current_index += 1
+    uuid_to_flat_index: dict[str, int] = {}
+    if viewable_file:
+        vtm_file_path = geode_functions.data_file_path(data_id, viewable_file)
+        tree = ET.parse(vtm_file_path)
+        root = tree.find("vtkMultiBlockDataSet")
+        if root is None:
+            flask.abort(500, "Failed to read viewable file")
+        current_index = 0
+        assert root is not None
+        for elem in root.iter():
+            if "uuid" in elem.attrib and elem.tag == "DataSet":
+                uuid_to_flat_index[elem.attrib["uuid"]] = current_index
+            current_index += 1
+
     model_mesh_components = model.mesh_components()
     mesh_components = []
     for mesh_component, ids in model_mesh_components.items():
@@ -270,27 +272,39 @@ def save_all_viewables_and_return_info(
     data_path: str,
 ) -> dict[str, Any]:
     with ThreadPoolExecutor() as executor:
-        native_files, viewable_path, light_path = executor.map(
-            lambda args: args[0](args[1]),
-            [
-                (
-                    geode_object.save,
-                    os.path.join(
-                        data_path, "native." + geode_object.native_extension()
+        tasks: list[tuple[Callable[[str], Any], str]] = [
+            (
+                geode_object.save,
+                os.path.join(data_path, "native." + geode_object.native_extension()),
+            )
+        ]
+        if geode_object.is_viewable():
+            tasks.extend(
+                [
+                    (geode_object.save_viewable, os.path.join(data_path, "viewable")),
+                    (
+                        geode_object.save_light_viewable,
+                        os.path.join(data_path, "light_viewable"),
                     ),
-                ),
-                (geode_object.save_viewable, os.path.join(data_path, "viewable")),
-                (
-                    geode_object.save_light_viewable,
-                    os.path.join(data_path, "light_viewable"),
-                ),
-            ],
-        )
-        with open(light_path, "rb") as f:
-            binary_light_viewable = f.read()
+                ]
+            )
+
+        results = list(executor.map(lambda args: args[0](args[1]), tasks))
+        native_files = results[0]
+        if geode_object.is_viewable():
+            viewable_path = results[1]
+            light_path = results[2]
+            with open(light_path, "rb") as f:
+                binary_light_viewable = f.read()
+            binary_light_viewable_str = binary_light_viewable.decode("utf-8")
+            data.viewable_file = os.path.basename(viewable_path)
+            data.light_viewable_file = os.path.basename(light_path)
+        else:
+            binary_light_viewable_str = "not_viewable"
+            data.viewable_file = ""
+            data.light_viewable_file = ""
+
         data.native_file = os.path.basename(native_files[0])
-        data.viewable_file = os.path.basename(viewable_path)
-        data.light_viewable_file = os.path.basename(light_path)
 
         assert data.native_file is not None
         assert data.viewable_file is not None
@@ -305,7 +319,7 @@ def save_all_viewables_and_return_info(
             "id": data.id,
             "name": name,
             "viewer_type": data.viewer_object,
-            "binary_light_viewable": binary_light_viewable.decode("utf-8"),
+            "binary_light_viewable": binary_light_viewable_str,
             "geode_object_type": data.geode_object,
         }
         if isinstance(geode_object, GeodeVertexSet):
diff --git a/tests/data/test.og_hst3d b/tests/data/test.og_hst3d
new file mode 100644
index 00000000..f007de2e
Binary files /dev/null and b/tests/data/test.og_hst3d differ