Not all cameras use the Bayer pattern (there are alternatives) and Canon (and I believe Nikon) are looking at ditching it entirely http://petapixel.com/2015/10

Not all cameras use the Bayer pattern (there are alternatives) and Canon (and I believe Nikon) are looking at ditching it entirely http://petapixel.com/2015/10/29/canon-120mp-sensor-reportedly-isnt-bayer-and-may-have-a-multi-layer-design/ http://petapixel.com/2015/10/29/canon-120mp-sensor-reportedl...