household_database visualization

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Hi all, I am trying to visualize with rviz the objects triangle mesh stored in the database. I call the household database GetModelMesh service and I put the returned points in a Marker for rviz visualization. I have noticed that every time I call the service GetModelMesh the value for mesh type is 0 which should be sphere. If I send the mesh vertices extracted to rviz and I set the marker type as sphere I always get the same sphere shape. Maybe I am missing something. How can I save the triangle mesh in a marker? It is correct that I get always a 0 as type from the GetModelMesh even if I change the object Id? Thanks