Sorry I should have been more clear about what I was talking about- that's a problem with mulling I suppose. I was quoting MW in his response to someone asking how to make a fly over but no pass for walking object . I was at the same time trying to make a split level map, so I latched onto this. I thought I should suggest it in this forum as a potential game improvement. It would be really nice to have a flight pass flag since it would allow for some neat maps. It might also be nice to include other pass conditions in the same change if anyone can think of any they would want (moving in the astral plane, shadow walking for ninjas only, swimming, the super secret shuffle...) rather than doing it again later. I just thought the no_fly_pass flag was a great idea. I would be willing to help if there is anything I could do (test it, modify the arc files...) but the actual coding is beyond me (although I would like to learn). The hard part as MW says would be having the monsters be able to use these pass conditions to attack.