blah, yeah sound can be part of that considering each cluster going off same time. Theres already new textures for it but your not aloud to have it yet
i doubt editing the sound file will bog it down, you can try making the audio file really quick which might help greatly. But each round makes a noise probably when they go off same time makes it worse.
The new explosion will have less useless particles but same amount of clusters... which should help.
Cluster sound is also used as death sound.
Bomblette_Explode02
For Player death? Or just the entire cluster?That's the one you're looking for.