Acording to google:What is a CMY Cube? CMY Cubes use primary colours Cyan, Magenta & Yellow (CMY) and are created to help view life & light through a different lens...Object made in blender, work both cycles and eevee.If you need any format or have other issues, contact me and i'll be glad to help and provide what you need. Thank you for passing by!*It's really simple to do it yourself, is a cube with a glass shader and the CMY color in the opposing sides! :)