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Threshold of cut to detect its lips: for instance a cube , hollow 0.95, the cut must be smaller than 0.99. I have not checked the full rules, but it would be nice this to be specified somewhereSigma Avro 22:23, 2 October 2014 (PDT)

Hollow doesn't matter. I can confirm that the server won't create new faces unless cut_end - cut_begin < 0.99. That's an approximate rule, as cut_begin = 0.000001 and cut_end = 0.99 will not create a new face anyway, even if they meet the condition (not sure why, maybe the server is rounding values too close to zero or one). The viewer, on the other hand, won't create new faces unless llRound(cut_end*65536) - llRound(cut_begin*65536) < 64880; that formula makes sense because PathBegin and PathEnd are 16-bit unsigned elements when transmitted to the viewer through an ObjectUpdate message. --Pedro Oval 05:47, 4 October 2014 (PDT)