Mrphng s spcl ffct n mtn pctrs nd nmtns tht chngs (r mrphs) n mg r shp nt nthr thrgh smlss trnstn. Trdtnlly sch dpctn wld b chvd thrgh dsslvng tchnqs n flm. Snc th rly 1990s, ths hs bn rplcd by cmptr sftwr t crt mr rlstc trnstns. smlr mthd s ppld t d rcrdngs, fr xmpl, by chngng vcs r vcl lns.