<amp-img width=1.33 height=1 layout=responsive src=https://images.bollywoodhungama.com/img/feature/12/oct/01102012barfivfx4b.jpg></amp-img><BR><br><p class=clear>&nbsp;</p><br><p class=clear>&nbsp;</p><span class=normal> The bubble and the firefly scene is one of the most challenging scenes in the film. Extensive research and development was carried out by animation and lighting artists to understand the motion of a bubble and lighting patterns of a firefly. The CGI and live action plates were fused together in the compositing phase. The teams extensive research was fruitful, when Anurag assigned a few more shots that required additional fireflies, just hours before delivering the shot. The animators had to match the bubble and firefly motion with Ranbirs visual line of focus. </span>