Doc:2.6/Manual/Textures/Types/Volume/Point Density

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Point Density Texture

Point density renders a given point cloud (object vertices or particle system) as a 3D volume, using a user-defined radius for the points. Internally, the system uses a BVH data structure for fast range lookups.

The rendered points are spherical by default, with various smooth falloff options, as well as simple Turbulence options for displacing the result with noise, adding fine detail. When using Point Density with a particle system, additional particle info such as particle velocity, age, and speed, can be visualized using a color/alpha ramp gradient.

Options

Point Density

Point Density texture with Particle System

Particle System

Particle System, Generate point density from a particle system.

Point Density texture with cloud Object Vertices

Object Vertices

Object Vertices, Generate point density from an object’s vertices.

Object

Radius

System

Falloff

Standard

Smooth

Soft

Softness

Constant

Density is constant within lookup radius.

Root

Particle Age

Particle Velocity

Velocity Scale

Falloff Curve

Use a custom falloff

Cache

Coordinate system to cache particles in

Global Space

Emit Object Space

Emit Object Location

Color Source

Data to derive the color results from

Constant

Constant color

Particle Age

Lifetime mapped as 0.0 - 1.0 intensity.

Particle Speed

Particle speed (absolute magnitude of velocity) mapped as 0.0-1.0 intensity.

Scale

Multiplier to bring particle speed within an acceptable range.

Particle Velocity

XYZ velocity mapped to RGB colors.

Scale

Multiplier to bring particle speed within an acceptable range.

Turbulence

Turbulence panel

Adds directed noise to the density at render time

Influence

Method for driving added turbulent noise

Static

Noise patterns will remain unchanged, faster and suitable for stills.

Particle Velocity

Turbulent noise driven by particle velocity.

Particle Age

Turbulent noise driven by the particle’s age between birth and death.

Global Time

Turbulent noise driven by the global current frame.

Noise Basis

See Here

Size

Scale of the turbulent noise

Depth

Level of detail in the added turbulent noise

Turbulence Strength

Strength of the added turbulent noise