How to create a particle system like absorb strength

Hi, i want to create a kind of self-preserved strength effect. Accumulation of particles to the center.How would I create?

Try this. Create a new particle system GameObject. Leave all settings as default except these:

  • Set Min & Max size to 0.3
  • Set Min & Max energy to 2
  • Unfold the Ellipsoid section and set the X,Y,Z to 2, 2, 2
  • Set the Min Emitter Range to 1
  • Unfold the Tangent Velocity section, and set the X,Y,Z to 0, 0, -1

If you want to change the size of the effect, you'll need to adjust the Ellipsoid X,Y,Z settings, and then change the Min & Max Energy so that the particles die just before they overshoot the centre again.