▁as ▁that ▁which ▁occurs ▁in ▁clouds , ▁fog , ▁milk , ▁fro sted ▁glass , ▁etc ., ▁combined ▁with ▁the ▁properties ▁of ▁the ▁met am aterial ▁co ating . ▁ ▁When ▁light ▁is ▁diff used , ▁a ▁thin ▁coat ▁of ▁met am aterial ▁around ▁an ▁object ▁can ▁make ▁it ▁essentially ▁invisible ▁under ▁a ▁range ▁of ▁light ing ▁conditions . ▁ ▁Active ▁cam ou fl age ▁▁ ▁Active ▁cam ou fl age ▁( or ▁adapt ive ▁cam ou fl age ) ▁is ▁a ▁group ▁of ▁cam ou fl age ▁techn ologies ▁which ▁would ▁allow ▁an ▁object ▁( us ually ▁military ▁in ▁nature ) ▁to ▁bl end ▁into ▁its ▁surr ound ings ▁by ▁use ▁of ▁pan els ▁or ▁coat ings ▁capable ▁of ▁changing ▁color ▁or ▁lum inos ity . ▁Active ▁cam ou fl age ▁can ▁be ▁seen ▁as ▁having ▁the ▁potential ▁to ▁become ▁the ▁per fection ▁of ▁the ▁art ▁of ▁cam ou fl aging ▁things ▁from ▁visual ▁detection . ▁ ▁Opt ical ▁cam ou fl age ▁is ▁a ▁kind ▁of ▁active ▁cam ou fl age ▁in ▁which ▁one ▁we ars ▁a ▁fabric ▁which ▁has ▁an ▁image ▁of ▁the ▁scene ▁directly ▁behind ▁the ▁wear er ▁project ed ▁onto ▁it , ▁so ▁that ▁the ▁wear er ▁appears ▁invisible . ▁The ▁draw back ▁to ▁this ▁system ▁is ▁that , ▁when ▁the ▁clo aked ▁wear er ▁moves , ▁a ▁visible ▁dist ort ion ▁is ▁often ▁generated ▁as ▁the ▁' fab ric ' ▁catch es ▁up ▁with ▁the ▁object ' s ▁motion . ▁ ▁The ▁concept ▁exists ▁for ▁now ▁only