Alpha

Under Alpha, you can set the alpha of a particle color.

Alpha Settings and Features

This page describes Alpha settings and features.

Particle alpha
A Animation Sets whether there is an alpha animation.
Settings shown under Alpha change when creating an animation.
B Default Sets the standard value of alpha using a value from 0 to 1.
Enable (checkbox) can be used to enable/disable settings.
C Runtime Setting To read about the Enable checkbox and resource copying, see here.

Note: The default setting is Do not animate.
The settings shown change when creating an animation.

Animation

You can select whether to animate the particle alpha from a pull-down menu.

Particle alpha 01

The following three items can be selected when setting an alpha animation.

Item Description
Do not animate Alpha animation is not performed.
Overwrite previous value Select this when you want to animate using a curve.
Overwrite previous value using four-key method Use this to create low-load animation comprised of key information for only four locations.

Do not animate

Alpha animation is not performed.

Overwrite previous value

Select this option when setting the default value for the alpha or when creating an animation using a curve.
Curves can be created using the CurveEditor panel.

Particle alpha 02
Default Value

This setting specifies the particle alpha default value from 0 to 1.

Playback Options

Playback Options are options to configure playback of an animation created in the CurveEditor panel along the specified timeline.

Options Description
None. Do not use playback options.
Fit to Lifetime Fit to lifespan is a playback option that automatically links animations created on the CurveEditor panel with particle lifetimes.
Specify Frame Count Specify frame count is a playback option that loops animations created in the CurveEditor panel based on the specified frames.
Frames per Cycle This specifies the number of frames in a single loop cycle when looping animations.
Random Offset You can use a random offset to change the starting playback keyframe for the animation on a per-particle basis.
Random Table The random table randomly obtains a value at particle emission time from the animation frame.

Overwrite previous value using four-key method

Provides a simple way to create particle alpha animation without using the Curve Editor.

For details about overwrite previous value using four-key method, see here.

Four-Key Method for Particle Alpha
Fade-In end time

Specifies a value of 0.0 to 1.0 for the duration the particle changes between the alpha animation start-time value and alpha animation mid-time value.

Fade-Out start time

Specifies a value of 0.0 to 1.0 for the time the particle starts to change between the alpha animation mid-time value and alpha animation end-time value.

Start-time value

Specifies the alpha value of the particle when the animation starts.

Mid-time value

Specifies the alpha value of the particle at the mid-point time between the start and the end of the animation.

End-time value

Specifies the alpha value of the particle when the animation ends.


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