Usually, when I join nD Deathrun, on some maps I get some fps drops, for example, deathrun_barbie_csbr , deathrun_hybrid2_v2 , deathrun_minecraft_final , deathrun_army , deathrun_poolday ,deathrun_wipeout , deathrun_countryside_final. I've known /invis (invisible) option from other deathrun servers, if you don't know what /invis does, well I'm here to explain:
When you go on the server there's a command called /flashlights, that disables everyone's flashlight (just for you) to avoid having lags, in my opinion I don't think it really works that well since it only applies to flashlights and not players/water.
/Invis, in this case can disable (make them invisible) your teammates (only works for ct cause t's need to see ct's for obvious reasons) also, when you'll type /invis a small box can appear on the left side of your screen with 2 options: Disable Cts [OFF] / Disable Water [OFF]. It has been said that it can help increasing FPS if you have drops on certain maps, since some maps contain water and are big (deathrun_minecraft_final or deathrun_poison)
• Smoother gameplay.
• Decreasing FPS drops.
• Less player confusion and makes it easier to focus.
• Transparency doesn't work for some of the skins/models. (plastic bag)
• Can't think of any.
Overall I think it's a very nice feature for deathrun since the playerbase has grown, playing with /invis would be much better for playerbase (and me ofc!!)
Thanks for reading!