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Ive just run my map with areaportals on, there no leaks or errors such as 'portal does not touch two spaces' as i fixed them all, however, everything thats portalled off is turned invisible unless i go inside that room or whatever, in which case everything else turns invisible.
Is this because i am only running on fast VIS not full? Or is it a portal problem. I only ask instead of running full vis as full takes ages