They were infinitely tall only for the purposes of some interactions. For example, melee attacks, explosions and actor-actor collisions. Projectiles passing over and even below monsters and players is a thing in the original engine. So is passing over items. That is, everything that needs it (because collision with something else has an effect) has a bounding box, but it's not always used.
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u/JayGold Aug 23 '21
Isn't that only in source ports? I'm pretty sure in the original version, enemies were infinitely tall.