Please enlighten me and correct me if im wrong:
If an enemy regulus within view range of allies or towers throws a mine, it will be visible always
(i see these little mine graphics all the time from enemy team, even though i dont have goggles nor totems around. Oddly enough 90% of the time my teammates plow straight through them, i guess theyre not paying that much attention, or are zoomed out max)
if an enemy regulus covered by fog of war throws a mine, it will not be visible (this one i would like veryfied as i dont know if thats true)
totems always reveal mines