This setting does not only change the size of the particles, but also Initial Speed, Force and Physics effects.
Life Min and Life Max: You can set the random time
of existence for each particle within a range determined by these two values.
Brightness: This value determines the luminosity of the particles (left side in the illustration below). However, if you want to have the halo effect, please turn on the HDR effect (right side in the illustration).
Use Distortion: You can activate and set the strength of the distortion effect for the particles. Please refer to the Creating Distortion Effect section for more information.