Hi, I played around with the gem particle system and for me it looks like there appear some strange dropouts. with the example patch 02.fountain every 2.5 seconds there is a dropout, where no new particles are created. plus, for example with speed 0.2 and source 0.2 and killold 5 it is not possible to kill all particles, the last one remains visible until a new one is created. pd 0.39.2-extended-test3 on XP. marius.