▁in ▁wooden ▁m ats , ▁over ▁which ▁tons ▁of ▁colored ▁sand ▁and ▁pow der ▁were ▁dump ed . ▁A ▁cycl or ama ▁was ▁painted ▁and ▁wrapped ▁around ▁the ▁set , ▁while ▁massive ▁industrial ▁fans ▁created ▁a ▁sand st orm . ▁The ▁film ing ▁was ▁un com fort able ▁for ▁actors ▁and ▁crew ▁al ike . ▁The ▁span dex ▁environmental ▁su its ▁Ko enig ▁and ▁Win field ▁wore ▁were ▁un vent il ated , ▁and ▁the ▁actors ▁had ▁to ▁signal ▁by ▁micro phone ▁when ▁they ▁needed ▁air . ▁Fil ming ▁equipment ▁was ▁wrapped ▁in ▁pl astic ▁to ▁prevent ▁mechanical ▁troubles ▁and ▁everyone ▁on ▁set ▁wore ▁bo ots , ▁mask s , ▁and ▁cover alls ▁as ▁protection ▁from ▁flying ▁sand . ▁ ▁Spo ck ' s ▁death ▁was ▁shot ▁over ▁three ▁days , ▁during ▁which ▁no ▁visitors ▁were ▁allowed ▁on ▁set . ▁Spo ck ' s ▁death ▁was ▁to ▁be ▁ir rev oc able , ▁but ▁N imo y ▁had ▁such ▁a ▁positive ▁experience ▁during ▁film ing ▁that ▁he ▁asked ▁if ▁he ▁could ▁add ▁a ▁way ▁for ▁Spo ck ▁to ▁return ▁in ▁a ▁later ▁film . ▁The ▁mind ▁m eld ▁sequence ▁was ▁initially ▁fil med ▁without ▁K elle y ' s ▁prior ▁knowledge ▁of ▁what ▁was ▁going ▁on . ▁Sh at ner ▁disag re ed ▁with ▁having ▁a ▁clear ▁glass ▁separation ▁between ▁Spo ck ▁and ▁Kirk ▁during ▁the ▁death ▁scene ; ▁he ▁instead ▁wanted ▁a ▁transl uc ent ▁div ider ▁allowing ▁view ers ▁to ▁see ▁only ▁Spo ck ' s ▁sil hou ette , ▁but