This patch must be loaded before your beloved'n'chosen enemy pack as support that gonna got rid of any stinky stealth monster that was placed on map by mean mapper. Say "No!" to invisible hitscanners and other stupid & utterly unfair shit that is outside of mods.
Do you enjoying your modded GZDoom sessions with cool'n'fancy monsters that is appearing by loading of some really juicy enemy packs? But what if mapper are really mean (like bully) and using damned stealth monsters that you are doesn't really like and even hate so much?
What do you gonna do? Write 100500 patches with new replacers that gonna get rid of stinky stealth monsters? Or you gonna edit every map that contains even single stealth monster?
Stop fear, 'cause your friend Rasta is here!
I am presenting you a small'n'humble ZScript event handler that gonna check out loaded map and then replace every smelly stealth monster with usual Vanilla equivalent, so then (in the end) your loaded favorite enemy pack gonna do its job.
Now you can forget about invisible Demons or (what really worse) about invisible Chaingunners!
P.S.: Since encounters of stealth monsters are really rare and most of enemy packs have replacers made via Decorate, this janky-cranky patch gonna work in 99% of cases. There might be a possibility that your favorite enemy pack implemented replacers via ZScript and then there may be a 1% chance that this patch gonna be useless. Then you might have to write your own Decorate patch for your beloved enemy pack, so this patch then may work properly. For further instructions see my own "Vaccine" for "ZBloody Hell" mod. Writing of specific Decorate replacer is a job of few minutes and if you really hate stealth monsters as I do - then this spent time is nothing for you.