Particle Info

Category: Particle

Shader Family: Texture

Output: Scalar

The Particle Info shader returns per-particle information such as Age, Size, and Density of a particle.

For general information about ICE particle shaders, see ICE Particle Shading.

Particle Info

Output

Type	Select the type of the information you want to get from the particle: Size, Age % (range of 0 - 1), Density (Alpha), Density After Falloff, Velocity, or ID.

Parameter Range

Source Start/End	Changes the output's value range to what you define here.
Max Output	The maximum end value of the result. For example, if you use Particle Age % from 0 - 1 and set the Max Output to 1, then you get 0-1 as the output. If you set the Max Output to 2, then you get a 0-2 range as the output.
Clamp Output Range	The output cannot be outside the Source Start/End value range. The end value cannot be higher than the Max Output value.

Render Tree Usage

You can use this shader to drive any per-particle texture input for the Particle Density shader. See Particle Density for information on per-particle inputs.

For example, you can drive the gradient's bias depending on the particle age:

In the Particle Info shader's property editor, set the Type to Age %.
Plug it into the Color Contrast > Bias port of a Fractal Scalar shader.
Then plug the Fractal Scalar into the Shape Density port of the Particle Density shader that, in turn, is plugged into the Density port of the Particle Volume Cloud shader.

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