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Persistent and Ephemeral Property Mappers (PB only)


    A particle property can be modified in either a persistent or an ephemeral way:

    • A persistent change to a particle property retains the most recent value set by a layer map for the remaining lifespan of the particle, unless the particle is modified by another operator such as Repel, Gravity, or Wall. For example, if you use a layer map to modify particle size, and you animate the layer map so it exits the frame, the particles will keep the last size value set by the layer map after it has exited the frame.
    • An ephemeral change to a particle property causes the property to revert to its original value after each frame. For example, if you use a layer map to modify particle size, and you animate the layer map so that it exits the frame, each particle returns to its original size value as soon as no layer map pixels correspond to it. Similarly, if you apply an operator such as Add, each time a particle passes over a different layer map pixel, the value of the layer map pixel is added to the original value of the particle.
    The white circle was placed in a composition, and its position was animated.
    The white circle was placed in a composition, and its position was animated.
    The white circle composition was used as a map in the Persistent Property Mapper and was associated with the scale of the particles.
    The white circle composition was used as a map in the Persistent Property Mapper and was associated with the scale of the particles.
    The white circle composition was used as a map in the Ephemeral Property Mapper and was associated with the scale of the particles.
    The white circle composition was used as a map in the Ephemeral Property Mapper and was associated with the scale of the particles.

    For more information, see Using Property Mappers (PB only).