huge FPS drop when inserting NPC’s

Hello All.


 




I am a bit stuck with a problem placing NPC's.


 




The Titanic exterior scene while it's sailing works fine, with 34 FPS having the whole ship in one sight, and around 50-60 FPS when normally walking around (no far drawdistance models added yet)




And if I turn the level of detail down the FPS lies constantly around 50-60 FPS.


 




But as soon as I add one NPC onto it's deck, the FPS decreases to no more than 15 FPS.




Weird thing is, if I add even 10 more, the FPS stays the same.


 




I once spoke to ASM about it and he believed it was the collission model grid that was too complex.




So I increased it's calculating grid size and removed all collissions except one surface where I tested the NPC's on.




And still the problem persists.


 




Does anyone know how to fix this?