In 3D, observations are more rare. Anderson localization of elastic waves in a 3D disordered medium has been reported (Hu et al., 2008). The observation of the MIT has been reported in a 3D model with atomic matter waves (Chabé et al., 2008). The MIT, associated with the nonpropagative electron waves has been reported in a cm-sized crystal (Ying et al., 2016). Random lasers can operate using this phenomenon.