Drifting

One of the 'upgrades' planned from Something More was to add a buffer around each zone to minimise the effect of drift on the end film - so that if you're drifting on the edge of a zone you only get that content once, but equally you can walk in and out of the same area lots of times and that will be reflected in your film by repeated sequences.
Here's a test for a single zone:
http://www.mscapers.com/mediascapes/558