What happens to the diffraction pattern (left) when a mosaic domain (right) splits apart?

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Note that at the start of the movie, when the two halves of the mosaic domain get too far apart to fit on the screen, I am "zoomin out". I am not changing the unit cell in the calculation! The diffraction pattern reflects the un-zoomed image. So, as the two new domains get farther and farther apart, you eventually see all the interference get averaged over each pixel, and you end up with a pattern that is exactly twice as intense as the pattern from either one of the two halves. Note that the beam is "coherent" throughout this calculation, and yet you only get interference effects when the two domains are close together. Nevertheless, the integrated intensity over any given spot is always the same, no matter what the gap between the mosaic domains is.