▁K iz una ▁is ▁able ▁to ▁liv est ream ▁and ▁record ▁videos ▁in ▁a ▁virtual ▁environment ; ▁this ▁is ▁generally ▁considered ▁to ▁rely ▁on ▁the ▁fre ew are ▁Mik u M iku D ance . ▁After ▁the ▁production ▁crew ▁designs ▁a ▁ 3 D ▁model , ▁they ▁manually ▁control ▁the ▁model ▁to ▁make ▁certain ▁movements . ▁Then , ▁they ▁h ire ▁a ▁voice ▁actor ▁to ▁give ▁the ▁animation ▁a ▁voice . ▁Mik u M iku D ance ▁has ▁often ▁been ▁used ▁in ▁the ▁videos ▁of ▁V ocal oid ▁pop ▁music , ▁allowing ▁users ▁to ▁import ▁and ▁control ▁the ▁ 3 D ▁models ▁of ▁virtual ▁characters ▁such ▁as ▁H ats une ▁Mik u . ▁ ▁On ▁the ▁other ▁hand , ▁some ▁net iz ens ▁think ▁that ▁K iz una ' s ▁fa cial ▁expressions ▁and ▁eye ▁changes ▁are ▁done ▁through ▁fa cial ▁tracking ▁using ▁fa cial ▁recognition ▁software ▁such ▁as ▁Face R ig . ▁The ▁technology ▁of ▁Face R ig ▁Live 2 D ▁modules ▁has ▁already ▁existed ▁for ▁a ▁considerable ▁amount ▁of ▁time . ▁Some ▁feel ▁that ▁K iz una ▁is ▁a ▁result ▁of ▁applying ▁this ▁technology ▁to ▁ 3 D ▁models , ▁similarly ▁by ▁project ing ▁fa cial ▁expressions ▁onto ▁a ▁virtual ▁reality ▁model , ▁thereby ▁hiding ▁the ▁ident ities ▁of ▁cre ators ▁and ▁actors ▁involved . ▁At ▁the ▁same ▁time , ▁some ▁think ▁that ▁om ni - direction al ▁motion ▁capture ▁technology ▁is ▁being ▁used . ▁After ▁recording ▁the ▁actions ▁of ▁real ▁actors , ▁this ▁data ▁is ▁used ▁to ▁simulate ▁movement ▁of