Ramp Modulator Node

Ramp modulators allow you to change particle behavior over the lifetime on the particle on a curve or ramp. You can put any vector or float from the emitter in the attribute to remap field.

Ramp Modulator Valid Parameters

Below is a list of valid parameters for the Ramp Modulator Node. These parameters appear in their drop down menu in attribute to remap.

Note

You can clear the values using the top if the drop down menu which is empty

Ramp Modulator Valid Parameters	Description
Scalar Parameters	objectIndex radius opacity ageNormalized mass age lifespan selfCollisionRadius collisionRadius
Vector parameters	scale rotation up velocity aim position color

Note

Point Instancers do not support the Opacity and Color parameter

Ramp Modulator UI

Ramp Modulator UI	Description
Ramp Time	Ramp normalizes the lifetime of the particle from 0 to 1.
Float parameters	Use Scalar Ramp attribute to remap emitter float parameters to ramp.
Vector parameters	Use Color Ramp attribute to remap emitter vector parameters or colors to ramp.
Adding A key or point	Left Click the ramp or color ramp.
Removing a key or point	Double left click the ramp point or color key.
Moving a key or point	Left click select and type in the scalar position and value field. Left click select and drag a point.
Changing interpolation	Left click select the key and change the interpolation in the dropdown field. Interpolation works from the point selected.
Color Picker	Clicking on the color value field causes a color picker to appear. Use this to select colors or change vectors.
Enter	Values and colors do not apply until the values are entered.

Ramp Modulator Node Parameters

Ramp Modulator

This group controls if the ramp modulator is on and its mode

Ramp Modulator	Description
Active	Toggle: Controls whether the Ramp Modulator active or inactive.
Mode	Dropdown controls how the ramp modulator changes the particle. Defaults to Multiply over: Overrides whatever settings you had in the emitter. add: Additive settings. Ramp adds to values multiply: Multiply settings. Ramp multiplies to values.

Ramp Modulator Scalar Ramp

Use parameters in this group when you want to change float parameters with a ramp over the normalized lifetime of the particle.

Scalar Ramp	Description
attribute to remap	Name of scalar attribute to remap. (float)
scalar ramp	Use this to create points for a curve/ramp. This curve represents the normalized lifetime of the particle.
position	This field shows the point’s time/location on the curve.
value	This field shows the point’s value on the curve.
interpolation	Linear: A direct line from point to point. Smooth: An eased line from point to point.

Ramp Modulator Color Ramp

Use parameters in this group when you want to change vector parameters with a ramp over the normalized lifetime of the particle.

Color Ramp	Description
attribute to remap	Name of color attribute to remap. (float)
scalar ramp	Use this to create keys for a curve/ramp. This color range represents the normalized lifetime of the particle.
position	This field shows the key’s time/location on the range.
value	This field shows the key’s value on the range. Selecting this field will pop up a color picker.
interpolation	Linear: A direct line from point to point. Smooth: An eased line from point to point.

Ramp Modulator Color Picker

Use the color picker to select colors and set vector ranges. This will not update until you select enter.

Color Picker	Description
Color UI	Click on color to select color. Values do not apply until entered.
R, G, B	Use this to key in Red, Green and Blue values Use fields to set Vector parameters. (X, Y, Z)
H, S, V	Use fields to set Hue, Saturation and Value values.
Hex field	Enter Hexadecimal code values here.