diff --git a/pdm.lock b/pdm.lock
index 99dc10f..6e544c5 100644
--- a/pdm.lock
+++ b/pdm.lock
@@ -5,7 +5,7 @@
 groups = ["default", "test"]
 strategy = ["inherit_metadata"]
 lock_version = "4.5.0"
-content_hash = "sha256:27a4efee379c00c25750a5a1e1d93d80bd6b6111ff7cf0820cd4a5b52fc7c1ee"
+content_hash = "sha256:78b8e57425bb7534d54468af85c73d5e034cbad1544b25d65a59bc622565cd9a"
 
 [[metadata.targets]]
 requires_python = ">=3.9"
diff --git a/pyproject.toml b/pyproject.toml
index 1b81c5b..5af1400 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ dependencies = [
     "numpy>=1.14",
     "OWSLib",
     "Pillow",
-    "pycollada",
+    "pycollada>=0.8",
     "pyproj",
     "SQLAlchemy",
     "diskcache",
@@ -32,5 +32,3 @@ test = [
 requires = ["pdm-backend"]
 build-backend = "pdm.backend"
 
-[tool.pdm]
-
diff --git a/scripts/lib/exports/collada_kit.py b/scripts/lib/exports/collada_kit.py
index 0ad97f3..0325dd4 100755
--- a/scripts/lib/exports/collada_kit.py
+++ b/scripts/lib/exports/collada_kit.py
@@ -129,6 +129,7 @@ def add_geom_to_collada(self, geom_obj, style_obj, meta_obj):
             self.mesh_obj.geometries.append(geom)
             self.geomnode_list.append(Collada.scene.GeometryNode(geom, [matnode]))
 
+            # Create metadata for popup window on map
             popup_dict[geometry_name] = {'title': meta_obj.name, 'name': meta_obj.name}
             node_label = geometry_name
 
@@ -151,6 +152,7 @@ def add_geom_to_collada(self, geom_obj, style_obj, meta_obj):
                                                          self.geomnode_list, geom_obj.seg_arr,
                                                          geom_obj.vrtx_arr, self.obj_cnt,
                                                          geom_obj.line_width, not geom_obj.is_vert_line)
+            # Create metadata for popup window on map
             for geom_label in geom_label_list:
                 popup_dict[geom_label] = {'title': meta_obj.name, 'name': meta_obj.name}
                 node_label = geom_label
@@ -183,6 +185,7 @@ def add_geom_to_collada(self, geom_obj, style_obj, meta_obj):
                                                            self.geomnode_list, vrtx, self.obj_cnt,
                                                            self.POINT_SIZE, colour_num)
 
+                # Create metadata for popup window on map
                 popup_dict[geom_label] = {'name': meta_obj.get_property_name(),
                                           'title': geometry_name.replace('_', ' ')}
                 # Some vertices do not have properties
diff --git a/scripts/lib/exports/collada_out.py b/scripts/lib/exports/collada_out.py
index 1f52acb..db502de 100644
--- a/scripts/lib/exports/collada_out.py
+++ b/scripts/lib/exports/collada_out.py
@@ -124,8 +124,6 @@ def make_line(self, mesh, geometry_name, geomnode_list, seg_arr, vrtx_arr, obj_c
             :param z_expand: is true if line width is drawn in z-direction else x-direction
             :returns: the line's geometry label
         '''
-        matnode = Collada.scene.MaterialNode("materialref-{0:05d}".format(obj_cnt),
-                                             mesh.materials[-1], inputs=[])
         geom_label_list = []
 
         for point_cnt, vert_floats, indices in line_gen(seg_arr, vrtx_arr, line_width, z_expand):
@@ -142,6 +140,8 @@ def make_line(self, mesh, geometry_name, geomnode_list, seg_arr, vrtx_arr, obj_c
             input_list.addInput(0, 'VERTEX',
                                 "#lineverts-array-{0:010d}-{1:05d}".format(point_cnt, obj_cnt))
 
+            matnode = Collada.scene.MaterialNode("materialref-{0:010d}-{0:05d}".format(point_cnt, obj_cnt),
+                                             mesh.materials[-1], inputs=[])
             triset = geom.createTriangleSet(numpy.array(indices),
                                             input_list, "materialref-{0:05d}".format(obj_cnt))
             geom.primitives.append(triset)