Lightbox

Small lightbox opened to reveal workings

A lightbox is a translucent surface illuminated from behind, used for situations where a shape laid upon the surface needs to be seen with high contrast.[1]

  1. ^ Tony White (20 June 2014). Animation from Pencils to Pixels: Classical Techniques for the Digital Animator. CRC Press. p. 309. ISBN 978-1-136-14422-6 – via Google Books.