User Manual

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Use Aspect From: The Use Aspect From menu includes three settings for the aspect
ratio of the brush image. You can choose image format to use the brush image’s
native aspect ration. Choose Frame Format to use the aspect ratio set in the Frame
Format Setting in the Fusion Preferences, or choose Custom to enter your own Pixel
X and Y dimensions.
 Line: This style produces straight line-type particles with optional “falloff.” The Size
to Velocity control described below (under Size Controls) is often useful with this Line
type. The Fade control adjusts the amount of falloff over the length of the line.
 Point Cluster: This style produces small clusters of single-pixel particles. Point Clusters
are similar to the Point style; however, they are more efficient when a large quantity
of particles is required. This style shares parameters with the Point style. Additional
controls specific to Point Cluster style are Number of Points and Number Variance.
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Sub Pixel Rendered: This checkbox determines whether the point particles are
rendered with Sub Pixel precision, which provides smoother-looking motion but
blurrier particles that take slightly longer to render.
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Number of Points and Variance: The value of this control determines how many
points are in each Point Cluster.
Color Controls
The Color Controls select the color and Alpha values of the particles generated by the emitter.
Color Variance
These range controls provide a means of expanding the colors produced by the pEmitter.
Setting the Red variance range at -0.2 to +0.2 will produce colors that vary 20% on either side
of the red channel, for a total variance of 40%. If the pEmitter is set to produce R0.5, G0.5, B0.5
(pure gray), the variance shown above will produce points with a color range between R0.3,
G0.5, B0.5, and R0.7, G0.5, B0.5.
To visualize color space as values between 0-256 or as 0-65535, change the values used by
Fusion using the Show Color As option provided in the General tab within the
Preferences dialog.
Lock Color Variance
This checkbox locks the color variance of the particles. Unlocking this allows the color variance
to be applied differently to each color channel, giving rise to a broader range of colors.
Particles Color Over Life Controls
Chapter – 103 Particle Nodes 2317