Krakatoa Repopulate Particles Tag
Last edited on May 7, 2014
The Krakatoa Repopulate Particles Tag can be used to increase the particle count of any Krakatoa particle source. It generates a cloud of new particles based on the various data channels of the source particles.
To add a Krakatoa Repopulate Particles Tag, select a Krakatoa particle source object, right-click it and select (New Tag) > Krakatoa Tags > Krakatoa Repopulate Particles.
Enable Particle Repopulation checkbox
- Checked by default.
- When unchecked, the tag will be ignored and no repopulation will be performed at render time or in the viewports (if viewport preview is enabled)
Fill Radius spinner and slider
- Defines the influence radius of each particle.
- Default is 1 cm.
- This value controls the range within which new particles will be seeded around the original particle.
- It also defines the voxel spacing of the grid used for repopulation calculations.
Subdivision spinner and slider
- Defines the number of voxel subdivisions.
- Default is 0 (no subdivisions)
- When set to higher values, will subdivide the voxel grid accordingly, producing finer distribution and more particles.
- A value of 1 produces 2x2x2=8 subdivisions, a value of 2 produces 3x3x3=27 subdivisions and so on.
- Normally, 5 particles are created in each subdivision, but this can be changed using the following control:
Number Of Particles Per Subdivision spinner and slider
- Defines the number of particles in every Subdivision (voxel and its sub-voxels according to the Subdivisions value avove).
- Default is 5.
Density Falloff Start spinner and slider
- Defines the start of the Density Falloff relative to the radius distance from the particle.
- Defaults to 0.
- Tha falloff is generally linear, but when the Start is set to 0, no falloff will be calculated.
- When the start is set to 1.0, the complete distance from the particle to the edge of the radius will contain the linear falloff.
- When the value is set to 0.5, the inner half of the radius will be populated with constant Density, the outer half will perform the linear falloff.
Random Seed spinner
- Defines the random seed for the distribution of the new particles.
- Default is 42.
- This value can be used to change the random pattern when particles are moving through the repopulation grid. In particular, you can animate (keyframe) this value over time to produce a changing random pattern to make the repopulated particles look like a noisy foam, otherwise it will appear as if the source particles are revealing a static pattern in space.
Enable in Viewport checkbox
- Default is unchecked.
- When checked, the viewport will preview the repopulated particles (could be very slow!)
Introduction > Particle Repopulation