diff --git a/tesseract_viewer_python/tesseract_robotics_viewer/tesseract_env_to_gltf.py b/tesseract_viewer_python/tesseract_robotics_viewer/tesseract_env_to_gltf.py
index 776ac410..c14d2e9e 100644
--- a/tesseract_viewer_python/tesseract_robotics_viewer/tesseract_env_to_gltf.py
+++ b/tesseract_viewer_python/tesseract_robotics_viewer/tesseract_env_to_gltf.py
@@ -219,7 +219,7 @@ def _convert_mesh(gltf_dict, gltf_buf_io, visual_node, visual_name, mesh):
 
     visual_node["scale"] = list(mesh.getScale().flatten())
 
-    if not mesh.getResource().getUrl().lower().endswith('.stl'):
+    if mesh.getResource() is not None and not mesh.getResource().getUrl().lower().endswith('.stl'):
         mesh_material = mesh.getMaterial()
         if mesh_material is not None: