MultiscalFiltering
Guided Mesh Normal Filtering https://orca-mwe.cf.ac.uk/98567/1/98567Guided%20Mesh%20Normal%20Filtering.pdf
Rolling guidance normal filter for geometric processing https://dl.acm.org/citation.cfm?id=2818068
Static/Dynamic Filtering for Mesh Geometry https://arxiv.org/abs/1712.03574