Before electronic (or even electric) projectors were around, professional artists were using device called a camera obscura[1] with similar results (though obvi

Before electronic (or even electric) projectors were around, professional artists were using device called a camera obscura[1] with similar results (though obviously dependent on natural illumination). There is much debate over whether great painters such as Vermeer used a camera obscura as early as the 17th century. https://en.wikipedia.org/wiki/Camera_obscura#1650_to_1800:_Introduction_of_the_magic_lantern,_popular_portable_box-type_drawing_aid,_painting_aid https://en.wikipedia.org/wiki/Camera_obscura#1650_to_1800:_I...