are Nucleus-based attributes that determine how nParticles behave when interacting with the Nucleus forces.
To disable Nucleus wind and gravity forces for the selected nParticle object
- In the , select the nParticle object’s tab.
- Under , turn on the following settings:
Set nParticle mass
When nParticles are created or emitted, they appear in the simulation with a mass set by the attribute. You can vary nParticle mass during the simulation by setting the ramp. The ramp allows you to map per-particle values to nParticle properties such as , , and .
For information about setting nParticle per-particle attribute ramps, see nParticle internal ramps and per-particle attributes.
To set nParticle mass
- In the scene view, select the nParticle object you want to edit.
- In the , select the nParticle object’s tab.
- Under , set the value.
- (Optional) Set the to add a randomized multiplier to the per-particle values.
To set the nParticle ramp
- In the scene view, select the nParticle object for which you want to set a ramp.
- In the section of the nParticleShape node , create the mass value curve by setting values for and . For more information, see Mass Scale.
- Set an method to determine how particle mass blends between each position on the ramp. See Interpolation.
- Set to determine which attribute is used as the input attribute for the ramp. See Mass Scale Input.
- (Optional) Set to define the range of the ramp. See Input Max.
- (Optional) Set the to add a randomized multiplier to per-particle values. See Mass Scale Randomize.