Depending on your own artistic preferences the joiner does not need to be a complete image with everything fitting together. This example shows the series fitting together loosely, sometimes worked with PhotoShop™ to fit smoothly, sometimes not (St Vitus's Cathedral , Prague):


There are various devices for dividing ill fitting lines, contours, tones or colours. This is a quick and easy way, with fills of black lines of varying thickness. This one at least retains those parts of the scene the photographer originally found interesting and as such is a more personal record. Remember, few of us look at every inch of a photograph. We take in certain parts that interest us.

Grids are another means to do a similar trick but do give the appearance of greater unity to the whole.