I'm trying to rig and render models that I'm exporting from Siemens NX. The models therefor have sharp edges, and in rendering them I would like to round/bevel the edges. I am at the moment attempting to use the bevel modifier, but it typically fails to work at all, and when it does it runs into some pretty bad failure modes. I'm hoping that this is something that someone else has done before. Thanks!
Here is a sample widget exported straight from NX (stl): https://drive.google.com/file/d/0B8j_hMJwdVcBcFBXLWpXTHVZMUU/view?usp=sharing