ly ▁reference ▁to ▁Gent le man ▁Gla cier , ▁an ▁old ▁Canadian ▁newspaper ▁cart oon ▁used ▁to ▁illustrate ▁snow ▁accum ulation ▁each ▁year . ▁Only ▁two ▁scenes ▁in ▁the ▁film ▁were ▁" aug ment ed ▁by ▁computer ▁animation ", ▁one ▁of ▁which ▁being ▁" The ▁Good ▁Sh ip ▁Mis ery " ▁song ▁sequence . ▁The ▁opening ▁credit ▁and ▁over t ure ▁sequence ▁has ▁the ▁animated ▁p engu in ▁characters ▁playing ▁and ▁dan cing ▁on ▁the ▁sheet ▁music ▁for ▁the ▁songs ▁in ▁the ▁film . ▁According ▁to ▁The ▁Free ▁L ance – Star , ▁the ▁anim ators ▁research ed ▁for ▁the ▁film ▁by ▁" watch ing ▁document aries ▁and ▁visit ing ▁zo os , ▁such ▁as ▁San ▁Diego ' s ▁Sea ▁World ▁and ▁Scotland ' s ▁Glasgow ▁Z oo ". ▁The ▁site ▁added ▁that ▁in ▁prom ot ional ▁material , ▁the ▁anim ators ▁explained ▁they ▁" dis cover ed ▁that ▁the ▁land ▁of ▁snow ▁and ▁ice ▁sh ines ▁with ▁many ▁different ▁h ues ". ▁ ▁Production ▁problems ▁ ▁During ▁a ▁late ▁stage ▁in ▁the ▁production , ▁M GM ▁ins isted ▁for ▁numerous ▁changes ▁to ▁be ▁made ▁to ▁the ▁film , ▁such ▁as ▁removing ▁some ▁characters , ▁trim ming ▁down ▁some ▁sequences , ▁and ▁having ▁the ▁voices ▁be ▁re - record ed , ▁as ▁a ▁result , ▁the ▁animation , ▁in ▁particular ▁the ▁special ▁effects , ▁fell ▁behind ▁and ▁to ▁make ▁sure ▁the ▁movie ▁made ▁it ▁to ▁the ▁dead line , ▁additional ▁color ing ▁had ▁to ▁be ▁done ▁at ▁Ref lex ▁An imation ▁Ltd ,