Robust algorithm for tunnel closing in 3D volumetric objects based on topological characteristics of points

► We propose a robust, linear in time modification of Aktouf et al. algorithm for tunnel closing in 3D volumetric objects. ► The studied algorithm is also a modification of tunnel closing algorithm (ITC) presented in the authors previous work. ► Proposed robust tunnel closing algorithm RTC outperforms ITC and the original Aktouf et al. proposition. ► RTC generates a tunnel closing patch which is insensitive to all kind of branches situated in the vicinity of the tunnel.