Method

This node emits particles from the positions of other currently active particles from other emitters. This is used to create trails of particles.

This node is typically connected as a child of another emitter node. When connected in this way it only emits particles at the locations of those emitted from the parent emitter. Alternatively this node can be connected to a Particle Root node and emitters can be connected to the Source Particle Nodes input. If no emitters are connected this node is ineffective.

The Initial Velocity Amount parameter causes the particles to be emitted with velocity taken from the source particle. The Initial Velocity Tangent Amount parameter causes the particles to be emitted with a velocity tangential to the source particle, which is used to make them appear to move sideways from the parent particle.

The Parent Transform Weight controls may be used to make the particle follow the parent particle’s motion.

Example

Attributes

Name Description
Max Particles Per Source Particle The maximum number of particles per particle.
Use Parent Particle Count Use the particle count of the source emitter to scale the number of particles emitted by this trail emitter.
Initial Velocity Amount Control the velocity particles spawn with in the direction of the source particle.
Initial Velocity Tangent Amount Control the velocity particles spawn with in the direction tangential to the source particle.
Parent Transform Weight How much the transform of the parent affects the transform of the particles.
Parent Transform Weight Life Coeffs How much the particles are affected by the parent nodes transforms at different stages of the particles life cycle. Values 2 and 3 are control points, and are used to control the curve between values
Parent Transform Randomness How much randomness to apply to the parents transform values.

Emission

Name Description
Emitter Active Change whether the emitter is on or off.
Life Control how low long each particle exists for.
Randomness How much randomness is added in the particles movement.
Life Randomness Control the randomness for the life of each particle.
Emission Rate What percentage of the particles are emitted from the emitter per second.
Max Particle Count Set a maximum particle count for the emitter.
Respawn Enabled Toggle whether a particle can respawn.
Emitter Sort Key Controls the processing order of the emitter.

Material

Can be overwritten by adding a material input.
Go to the material page

Name Description
Colour RGB colour of particles.
Diffuse Control how much the light is scattered from the surface of the object.
Emissiveness Control how much light is emitted by the particle.
Life Colour Affecter Weight Controls how much the result of any Life Colour Shading nodes are blended with the particle’s colour.
Particle Scale Scale the size of the particle.
Dof Amount How much depth of field effects the particles material.
Density The density, for use in some simulations.
Temperature The density, for use in some simulations.
Cooling Rate The cooling rate, for thermal dynamics simulations.
Density Decay Control the rate of decay in the density.
Fade In Time What percentage through the particles life span the particle fades in.
Fade Out Time What percentage through the particles life span the particle fades out.

Inputs

Name Description Typical Node Input
Source Particle Nodes The emitter(s) from which particles are used as sources for the trail emitter. Particle Emitters
Mask Node Mask out areas that particles cannot spawn. Image Plane
Colour Control Nodes Control the colours of the particles. Colour Ramp
Transform Modifier Links all transform properties to the input node. Null
Target Node Always faces the x-axis towards the inputs anchor point. Null
Local Transform Override Override the transformation values of the node, relative to its parent. Null

Outputs

The transformation values of thi node will be inherited by its children. Furthermore, Affectors, Shading And Rendering nodes will only be effective to the particles emit by this emitter.