In his influential and meticulously annotated Latin edition of the works of Ibn al-Haytham and Witelo, (1572), German mathematician Friedrich Risner proposed a portable camera obscura drawing aid; a lightweight wooden hut with lenses in each of its four walls that would project images of the surroundings on a paper cube in the middle. The construction could be carried on two wooden poles. A very similar setup was illustrated in 1645 in Athanasius Kircher's influential book "Ars Magna Lucis Et Umbrae".