@unknownuser said:

Does exist a ruby script for kill the internal surfaces but not the edges of these surfaces (after a Pushpull + Ctrl for example)?
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How about one for killing external surfaces, after an intersection of multiple groups, when forming internal models only (eg for export for light or acoustic modelling)? I'd like to place a marker (or the camera) inside my room and have a plugin automatically trim and delete any surfaces not reachable from that point. Sort of like doing a blow-mould!

Would be very handy!