The Particle Size attributes set particle radius. You can use the Radius Scale ramp to map radius on a per-particle basis using nParticle attributes, such as Lifespan, Color, and Mass, as the ramp's input values.
Radius of individual particles belonging to the nParticle object. The Radius setting provides the input value for the Radius Scale ramp.
Lets you set per-particle radius based on the Radius attribute value. On the ramp, the vertical component represents values from 0 (no radius) to 1 (equal to the Radius attribute value). See Set attributes using ramps.
If the Radius Scale Input is set to Off, the per-particle attributes are deleted. If it is set to any other value, the radius per-particle attributes are created if they don’t already exist.
Specifies which attribute is used to map the Radius Scale ramp values.
When off, the per-particle attributes are deleted. If you want to use an expression with the per-particle attribute, you need to manually add them again. See About nParticle internal ramps and per-particle attributes.
The per-particle attribute values are determined by the nParticle’s age, which is based on the particle Lifespan mode. See nParticle Lifespan attributes.
The per-particle attribute values are determined by the normalized age of the nParticle. To use Normalized Age, the nParticle object must have a defined lifespan. For example, the nParticle object’s Lifespan Mode attribute must be set to Constant or Random range.
When Normalized Age is used, The per-particle attribute values are mapped within the range of the nParticle object’s lifespan.
The per-particle attribute values are determined by nParticle speed.
The per-particle attribute values are determined by nParticle acceleration.
The per-particle attribute values are determined by the nParticle’s ID. Particle IDs are unique and generated at the beginning of the particle’s lifespan.
The per-particle attribute values are determined by a randomized nParticle ID.
Sets the maximum value for the range used by the ramp.
Sets a random multiplier for the per-particle attribute values.