I think Steve made a typo. You need to set the Emitter Duration in the Required Module to 1, not 0. 0 means looping.
Then in the Spawn module, you need to set the Rate Scale Constant value to 0, and then click the + icon next to Burst list and set the Count to match the spawn Rate that is already specified above. Then you’ll get the same effect, but it will only last as long as the lifetime of the particles. i.e. if you want to make it a longer burst, increase the Lifetime of the particles.
3 Likes