Adding streaks

Comet tails and other streaking effects are created by spawning additional…particles from the main particles.…For these effects, we will need to use the ParticleSpawn node. To see how it…works, we will need a Nuke script.…So let's go up to File > Open > Project Media > Lesson_06_Media, script number 06,…streaking, Open. And we will push in and get a little bit more screen space here.…

Okay, let's take a look at what we have got. Cursor in the Viewer, type F, orbit…around, push in, and over, and play.…So you have got a little particle emission set up here. We are getting our color…and our graphics from this Read node; this Grade node turns it yellow.…We are using the card as an emitter to vault them up into the air, and we have a…little particle gravity here to make them bend back down. I will stop this.…The mission is, then, to put streaks after these.…

I am going to start by cutting down on the point density. I am going to set the…emission rate from the particle emitter from 0.5 to 0.1.…So the particle emitter will emit one particle every 10 frames, which will…