, ▁where in ▁the ▁vie wer ▁is ▁both ▁the ▁watch er ▁( of ▁a ▁self - port rait ▁in ▁progress ) ▁and ▁the ▁watched , ▁and ▁the ▁many ▁adapt ations ▁of ▁that ▁painting ▁in ▁various ▁media ▁ ▁Ver on ese ' s ▁Ven us ▁with ▁a ▁Mir ror ▁Mir ror s ▁have ▁been ▁used ▁by ▁artists ▁to ▁create ▁works ▁and ▁h one ▁their ▁craft : ▁ ▁Fil ipp o ▁Brun ell esch i ▁discovered ▁linear ▁perspective ▁with ▁the ▁help ▁of ▁the ▁mirror . ▁ ▁Leon ardo ▁da ▁V inci ▁called ▁the ▁mirror ▁the ▁" master ▁of ▁pain ters ". ▁He ▁recommended , ▁" When ▁you ▁wish ▁to ▁see ▁whether ▁your ▁whole ▁picture ▁acc ords ▁with ▁what ▁you ▁have ▁port rayed ▁from ▁nature ▁take ▁a ▁mirror ▁and ▁reflect ▁the ▁actual ▁object ▁in ▁it . ▁Comp are ▁what ▁is ▁reflected ▁with ▁your ▁painting ▁and ▁carefully ▁consider ▁whether ▁both ▁li ken esses ▁of ▁the ▁subject ▁correspond , ▁particularly ▁in ▁regard ▁to ▁the ▁mirror ." ▁ ▁Many ▁self - port ra its ▁are ▁made ▁possible ▁through ▁the ▁use ▁of ▁mirror s : ▁ ▁Mir ror s ▁were ▁used ▁by ▁D ür er , ▁Fr ida ▁K ah lo , ▁Rem brand t , ▁Van ▁G og h ▁and ▁others , ▁to ▁make ▁self - port ra its . ▁ ▁M . ▁C . ▁E scher ▁used ▁special ▁shapes ▁of ▁mirror s ▁in ▁order ▁to ▁achieve ▁a ▁much ▁more ▁complete ▁view ▁of ▁his ▁surr ound ings ▁than ▁by ▁direct ▁observation ▁in ▁Hand ▁with ▁Ref lect ing ▁S phere