Starfield from Particle Emitter/System

Thank you for clarifying that told me exactly what I needed to know.

The TLDR is that by making the particle system a child of the camera you don't need to do any extra work and the engine itself will handle making sure the particles are always going in the right direction in relation to the camera.

The effect you are trying to achieve sounds relatively complex when you first think of it and it might even sound like there is a lot of math involved. However thanks to the Unity parent/child gameobject system something like that is INCREDIBLY easy.

To set it up:

1. Create an empty GameObject and place it within your Camera as a child object(you can also do this with a particle system instead of an empty gameobject however I am unfarmiliar with them so I will tell you how to set it up with legacy particles). Either way reset the position of whichever you chose

2. Place this empty gameobject or particle system infront of your camera and an appropriate distance(whatever is right for the effect you want)

3. Add 3 components to it

component>effects>legacyParticles>elipsoidemmitter

component>effects>legacyParticles>particleanimator

component>effects>legacyParticles>particlerenderer

1. most of the work from here is on the emitter use the render and the animator to setup the look of your particles

to set up the emitter to get the effect you want:

Set your max and min emission to something high(300-400ish)

Set your local velocity to 0,0, -30ish

then set your ellipsoid to 10,10,0

I have a test scene setup right now giving the effect you described with this formula to get it. although I would recommend using the particle system as opposed to the legacy components I described as they are probably very good to learn.

Hope this helps.