ZDoom

It has been renamed to +MVISBLOCKED.

I'm guessing this is now called +VISALWAYSFAIL ?

Ah - okay - I will modify it, then.

TIL I need to click on the button instead of Ctrl+Enter in order to pass the invisible captcha.

Anyway thanks for the [i]super[/i] quick response though as I mentioned in the [url=https://github.com/ZDoom/gzdoom/issues/2003]GitHub issue[/url] making an equivalent to +INVISIBLE would still cause the monster to lose an existing target.

I basically tried to make it work with all RF_INVISIBLE checks on the playsim side, without changing anything on the rendering side. So it should physically work like an +INVISIBLE actor except that it can be seen by the player. If this is incorrect, please feel free to put a PR against my mistake, because I am not sure exactly what part is wrong. :)

I see this is still affected by the "random chance to be seen anyway" part of CheckSight? Is that intended?

https://github.com/ZDoom/gzdoom/commit/8af2f5aaf6223fb91698ab7f59c0c7da5fa81451

A flag that, if true, would cause another actor's sight check to always return false.

The use case I've got is [url=https://forum.zdoom.org/viewtopic.php?t=77242]here[/url], but I'm sure there are others - camouflage, lighting/disguise stealth tricks, trying to get around shields, etc..

Currently every option either ends up with unwanted physics effects (+nosector) or rendering effects (+invisible) or causes the attacker to change targets (virtually everything else).