I’m using Unity 2018, and I was able to solve a few problems that other posts mentioned, directly in the editor without needing extra code. Perhaps these features were not available in older versions.
- Set the emitter shape to rectangle, not box, since it is 2D instead of 3D.
- Constrain the particles to XY so they don’t emit away from the camera and become hidden by background. See the settings in my screenshot, notably the “Limit Velocity over Lifetime” section where Z is set to 0.
- Destroy when finished, check Destroy under Stop Action dropdown.
Other options:
- Gravity. I added gravity to have my particles drift down.
- Color over lifetime. I changed color and alpha over time to have the particles fade out.
Settings and screenshot below:
