Stuttering fps with some mods

[Adny]

Gary - Dark Secrets uses an ungodly amount of particle systems (mostly fog) in every single level, so its very likely that is an issue; also, majority of the levels in that mod are just gigantic. I had a similar problem with Poisonous, one of the levels uses 20+ steam particles in one room. It's an issue that is out of your hands, its solely the fault of the mapper that didn't take into consideration how cramming so many things into one area could cause bad performance on some computers.