I dislike the current way of invisibility and how see_invisible corresponds with it. Currently, if an obj's invisibility is 5 and a mob's see_invisible is 10, it can see that obj. That's fine and all, but how about some flexibility? What if you wanted the obj to be visible if the mob's see_invisible was exactly 5? Perhaps something along the lines of see_invisible_freq, and invisibility_freq settings? Therefore setting an obj's invisibility_freq to 10.5, and a mob's see_invisible_freq to 10.5 would result in the mob being able to see the obj. For even more flexibility, how about invisibility_freq = "5 to 11.2", kind of how setting the screen_loc value on an object. This would really help as a built-in variable, please recommend it. =D