Monsters attacking across tall ledges
From Doom Wiki
This article or section is a stub. Please help the Doom Wiki by adding to it.
A player can only hit a monster with a hitscan attack if the monster is within his (vertical) field of vision; when it is in a neighboring sector far above or far below the player's, it cannot be damaged. The monster's attacks experience no such constraint, however, and seem able to hurt the player no matter what the difference in altitude.
This is an artifact of Doom's primarily two-dimensional nature.
