Particle Shape

| Falloff | Shape

Shader Type: Particle (texture)

Output: Color (RGB) value

Renders the shape of the particles, including the way the falloff (transparency) is calculated around the shape.

Name

The shader’s name. Enter any name you like, or leave the default.

Falloff

Type

Radial falloff type: Linear, Square, Smooth, Cubic, Gaussian, User-defined, or None. If you select User-defined, you can set its Exponent value below; if you select Gaussian, you can set its falloff Rate below.

Pattern Center

X, Y

Center point for falloff pattern in X and/or Y.

Modulation

RGB, Alpha

Multiplies the RGB and/or Alpha component of the base color by the falloff value at the intersection point.

RGB/Alpha Inverted

Inverts the shape value when multiplying the RGB/Alpha components.

Range

Start, End

The distance from the given center at which the falloff value goes to 1 (Start) and 0 (End). The falloff value is interpolated between the Start and End values using the Falloff Type selected.

User-defined Falloff

Exponent

If you select User-defined as the Type, you can control the transparency falloff rate with this value. Values less than 1 give a steep falloff from the center. Higher values give a more gradual falloff.

Gaussian Falloff

Rate

If you select Gaussian as the Type, you can control the rate of falloff for this interpolation. Higher values give a more rapid falloff.

Shape

Type

Lets you choose a geometric shape pattern for emitted particles.

None uses no predefined shape for emitted particles.

Step is the ratio of the size of the particle set in a single step.

Sine creates a particle with an editable number of rings that are equally spaced from one another.

Star creates a particle with a star-like configuration.

Beam gives the particle a long beam shape with a bright center surrounded by a glow effect.

Symmetry creates symmetrical particles.

Noise creates an infinite variety of patterned effects.

Turbulence creates chaotic movement.

Fractal creates a fractal pattern.

Pattern Center

X, Y

Center point for the shape pattern in X and/or Y.

Modulation

RGB, Alpha

Multiplies the RGB and/or Alpha component of the base color by the shape value at the intersection point.

Step

Width

Width of step, which is a ratio of the particle size. Range is 0 to 1.

Sine

Scale

Scale of sine. Range is 0 to 30.

Star

Branches

Number of branches in star. Range is 0 to 20.

Beam

Width

Width of beam. Range is 0 to 1.

Symmetry

Width

Width of symmetry. Range is 0 to 2.

Noise

Time

Evaluation time of noise pattern over time. Range is 0 to 10.

Scale

Scale of the noise pattern. Range is 0 to 5.

Turbulence

Time

Evaluation time for turbulence pattern over time. Range is 0 to 10.

Scale

Scale of turbulence pattern. Range is 0 to 5.

Low Frequency

Low frequency of turbulence pattern. Range is 0 to 10.

High Frequency

High frequency of turbulence pattern. Range is 0 to 10.

Fractal

Time

Evaluation time for fractal pattern over time. Range is 0 to 10.

Scale

Scale of fractal pattern. Range is 0 to 5.

Weight

Iteration weight for fractal pattern. Range is 0 to 1.

Granularity

Granularity of fractal pattern. Range is 0 to 5.

Octaves

Number of octaves (iterations) of noise in fractal pattern. Range is 0 to 8.



Autodesk Softimage v.7.5