diff --git a/src/ansys/speos/core/opt_prop.py b/src/ansys/speos/core/opt_prop.py
index efa698f3e..0132d67cc 100644
--- a/src/ansys/speos/core/opt_prop.py
+++ b/src/ansys/speos/core/opt_prop.py
@@ -169,7 +169,49 @@ def set_volume_opaque(self) -> OptProp:
         self._vop_template.opaque.SetInParent()
         return self
 
-    def set_volume_optic(
+    @property
+    def volume_optic(
+        self,
+        index: float = 1.5,
+        absorption: float = 0,
+        constringence: Optional[float] = None,
+    ) -> OptProp:
+        """
+        Transparent colorless material without bulk scattering.
+
+        Parameters
+        ----------
+        index : float
+            Refractive index.
+            By default, ``1.5``.
+        absorption : float
+            Absorption coefficient value. mm-1.
+            By default, ``0``.
+        constringence : float, optional
+            Abbe number.
+            By default, ``None``, means no constringence.
+
+        Returns
+        -------
+        ansys.speos.core.opt_prop.OptProp
+            Optical property.
+        """
+        if self._vop_template is None:
+            self._vop_template = ProtoVOPTemplate(
+                name=self._name + ".VOP",
+                description=self._sop_template.description,
+                metadata=self._sop_template.metadata,
+            )
+        self._vop_template.optic.index = index
+        self._vop_template.optic.absorption = absorption
+        if constringence is not None:
+            self._vop_template.optic.constringence = constringence
+        else:
+            self._vop_template.optic.ClearField("constringence")
+        return self.volume_optic
+
+    @volume_optic.setter
+    def volume_optic(
         self,
         index: float = 1.5,
         absorption: float = 0,
@@ -207,7 +249,6 @@ def set_volume_optic(
             self._vop_template.optic.constringence = constringence
         else:
             self._vop_template.optic.ClearField("constringence")
-        return self
 
     # Deactivated due to a bug on SpeosRPC server side
     # def set_volume_nonhomogeneous(
@@ -267,7 +308,10 @@ def set_volume_library(self, path: str) -> OptProp:
         self._vop_template.library.material_file_uri = path
         return self
 
-    def set_geometries(
+    @property
+    def geometries(
+        self,
+    ) -> List:
         self,
         geometries: Optional[List[Union[GeoRef, body.Body, face.Face, part.Part.SubPart]]] = None,
     ) -> OptProp:
@@ -296,11 +340,46 @@ def set_geometries(
                 else:
                     msg = f"Type {type(gr)} is not supported as Optical property geometry input."
                     raise TypeError(msg)
+            return self._material_instance.geometries.geo_paths
             self._material_instance.geometries.geo_paths[:] = [
                 gp.to_native_link() for gp in geo_paths
             ]
         return self
 
+    @geometries.setter
+    def geometries(
+        self,
+        geometries: Optional[List[Union[GeoRef, body.Body, face.Face, part.Part.SubPart]]] = None,
+    ) -> None:
+        """Select geometries on which the optical properties will be applied.
+
+        Parameters
+        ----------
+        geometries : List[ansys.speos.core.geo_ref.GeoRef], optional
+            List of geometries. Giving an empty list means "All geometries"
+            By default, ``None``, means "no geometry".
+
+        Returns
+        -------
+        ansys.speos.core.opt_prop.OptProp
+            Optical property.
+        """
+        if geometries is None:
+            self._material_instance.ClearField("geometries")
+        else:
+            geo_paths = []
+            for gr in geometries:
+                if isinstance(gr, GeoRef):
+                    geo_paths.append(gr)
+                elif isinstance(gr, (face.Face, body.Body, part.Part.SubPart)):
+                    geo_paths.append(gr.geo_path)
+                else:
+                    msg = f"Type {type(gr)} is not supported as Optical property geometry input."
+                    raise TypeError(msg)
+            self._material_instance.geometries.geo_paths[:] = [
+                gp.to_native_link() for gp in geo_paths
+            ]
+
     def _to_dict(self) -> dict:
         out_dict = {}