Emission

    The Emitter system works just like its name says: it emits/produces particles for a certain amount of time.In such a system, particles are emitted from the selected object from the Start_frame to the _End frame and have a certain lifespan.These particles are rendered default as ,but you may also render these kind of particles as objects(depending on the particle system's render settings,see Visualization).

    Particle Emission settings.

    The buttons in the Emission panel control the way particles are emitted over time:

    • Number
    • The maximum amount of parent particles used in the simulation.
    • Start
    • The start frame of particle emission. You may set negative values,which enables you to start the simulation before the actual rendering.
    • End
    • The end frame of particle emission.
    • Lifetime
    • The lifespan (in frames) of the particles.
    • Random
    • A random variation of the lifetime of a given particle.The shortest possible lifetime is Lifetime × (1 - Random).Values above 1.0 are not allowed.For example with the default Lifetime value of 50 a Random setting of 0.5will give you particles with a live span ranging from 50 frames to (50 × (1.0 - 0.5) = 25)frames, and with a Random setting of 0.75 you will get particles with live spans rangingfrom 50 frames to (50 × (1.0 - 0.75) = 12.5) frames.

    Emit From parameters define how and where the particles are emitted,giving precise control over their distribution. You may use vertex groups to confine the emission,that is done in the Vertex Groups panel.

    • Emits particles from the vertices of a mesh.
    • Faces
    • Emits particles from the surface of a mesh's faces.
    • Volume
    • Emits particles from the volume of an enclosed mesh.

    Distribution Settings

    • Random

    • The emitter element indices are gone through in a random order instead of linearly (one after the other).For Faces and Volume, additional options appear:

    • Even Distribution

    • Particle distribution is made even based on surface area of the elements,i.e. small elements emit less particles than large elements, so that the particle density is even.
    • Jittered

    • Particles are placed at jittered intervals on the emitter elements.

      • Particles/Face
      • Number of emissions per face (0 = automatic).
      • Amount of jitter applied to the sampling.
    • Random
    • Particles are emitted from random locations in the emitter's elements.
    • Grid

    • Particles are set in a 3D grid and particles near/in the elements are kept.

      • Invert Grid
      • Invert what is considered the object and what is not.
      • Hexagonal
      • Uses a hexagonal-shaped grid instead of a rectangular one.
      • Resolution
      • Resolution of the grid.
      • Random
      • Add a random offset to grid locations.

    Your mesh must be to emit particles from the volume.

    Some modifiers like the Edge Split Modifier break up the surface,in which case volume emission will not work correctly!

    • Take any Modifiers above the Particle Modifierin the into account when emitting particles,else it uses the original mesh geometry.

    Note

    Note that particles may differ in the final render if these modifiersgenerate different geometry between the viewport and render.