TFS 1.X+ block revealing the monster when they are in an invisible condition

[Obito]

Hello! As the title suggests, I'm wondering how I can prevent monsters from being revealed when they are in an invisible condition after being hit by a spell.
Additionally, I'd like to keep them invisible until the player uses the spell "utana vid" to reveal them.
Currently, my approach to keeping the monster invisible is by increasing 'the interval' would appreciate any guidance or advice you may have to offer. If anyone has any experience or knowledge in this area, I would love to hear your thoughts.
Also, this will need source edits? or only LUA?

 

[EvulMastah]

forgottenserver/src/monster.cpp at 2aea2638f6612d368843fc0f8acb4748ca3333e9 · otland/forgottenserver

A free and open-source MMORPG server emulator written in C++ - otland/forgottenserver

github.com

 

[Obito]

forgottenserver/src/monster.cpp at 2aea2638f6612d368843fc0f8acb4748ca3333e9 · otland/forgottenserver

A free and open-source MMORPG server emulator written in C++ - otland/forgottenserver

github.com

Thanks, I didn't think it could be done in C++. I thought it would have to be done with Lua because I recently moved to version 1.x.