<span class=normal>With over 700 shots to augment, Viral admits that there were a few challenging moments in executing the visual effects in PK, he says, For the most of the film, rotoscoping and paint were required on about 550 shots. While in 3D tracking, the biggest challenge was the ear replacement sequence in which the artists had to match the motion of PKs ears precisely, so that it could be replaced with CGI ears they made digitally. </span><BR><BR><br><p class=clear>&nbsp;</p><amp-img width=1.33 height=1 layout=responsive src=https://images.bollywoodhungama.com/img/feature/15/feb/vfxpk14.jpg></amp-img><BR><br><p class=clear>&nbsp;</p><amp-img width=1.33 height=1 layout=responsive src=https://images.bollywoodhungama.com/img/feature/15/feb/vfxpk15.jpg></amp-img><BR><br><p class=clear>&nbsp;</p><amp-img width=1.33 height=1 layout=responsive src=https://images.bollywoodhungama.com/img/feature/15/feb/vfxpk16.jpg></amp-img><BR>