Since Sony has developed their multishot technology in recent years, i can imagine that for each pixel three shots are taken (RGB) that are composed together. If there is camera movement and a pixel receives three different kinds of light information, the algorithms must provide for the loss of colour information. So, I guess you end up with noise, too. In multishot tech, usually blurred shots are omitted. It is a trade-off, and it doesn t work for RAW. Also, with long exposure, does it mean that the filter array switches endlessly until you have your minute or so of exposure time? Wonder how that figures.