How to make enemies instantly appear?

[Shaqodemon]

In a number of maps I've seen enemies just instantly appear in front of me. There are no teleport sounds and the enemy is usually inactive until it sees me which leads me to believe teleporters are not being used. It's almost as if the enemies are already there and become visible and wake up after crossing a line def. How is this done?

[holaareola]

In vanilla this is usually done with deaf monsters placed in a sector sunk way down below the surrounding floor which is instantly raised using the lower to highest floor linedef types, e.g. 19.

[Tyler-J]

6 hours ago, Shaqodemon said:

In a number of maps I've seen enemies just instantly appear in front of me. There are no teleport sounds and the enemy is usually inactive until it sees me which leads me to believe teleporters are not being used. It's almost as if the enemies are already there and become visible and wake up after crossing a line def. How is this done?

 

the easiest way to figure out how its done is to open up said map with slade or gz doombuilder and see for yourself . there are options in the gzbuilder that allow you turn off teleport fog. and have enemies "ambush" attack on sight.

Edited November 6, 2021 by Tyler-J

[Doom-X-Machina]

On 11/6/2021 at 11:30 PM, Shaqodemon said:

In a number of maps I've seen enemies just instantly appear in front of me. There are no teleport sounds and the enemy is usually inactive until it sees me which leads me to believe teleporters are not being used. It's almost as if the enemies are already there and become visible and wake up after crossing a line def. How is this done?

Well, the way I would do it...

I use UDB and UDMF format so, I would build a sector outside the main map area with a tagged monster and then place a tagged teleport location where I wanted the monster to appear. Then I would set a linedef to activate when crossed to teleport that monster to the teleport location using action 71-Teleport (silent) so there's no teleport fog. Monster set to ambush mode so won't activate unless on sight or sound.