Wind parameters
Updated: 02/18/2025
This page describes the wind parameters for physics operations in the Cubism AE Plugin.
The wind parameters are features introduced in Cubism 5 AE Plugin R5 beta1.
Wind and other elements can be expressed by providing the [Wind] parameter to the model’s physics operations.
Both “real-time” and “animation bake” are supported.
Enable wind parameters
Open the [Live2D Cubism Renderer] effect on the model layer where the animation was set, expand [Physics] > the [Wind] menu, and turn on “Realtime.”
If [Enable] is checked, the [Wind] parameters are enabled and the wind parameters are reflected in the physics calculations.
TIPS
[Execute] needs to be clicked to bake the result of the wind parameters and reflect it in the keyframe.
Wind parameter settings
There are two wind parameters.
Max Force
Set the maximum force value exerted by the wind on the physics.
The optimal value depends on the model’s physics settings.
The default setting is 5.0.
Force Multiplier
Set the magnitude and direction of the force exerted by the wind on the physics.
This parameter is multiplied by [Max Force] and provided to the physics calculation.
The value can be set from -100% to 100%, with negative values flipping the direction of wind.
Set the optimum value for Max Force
To set optimal wind parameters, the Max Force value must be set for each model.
This is because the optimal value varies depending on the physics settings.
First, let’s find the optimal value for Max Force by following the procedure shown below.
1. Turn on [Realtime].
Physics calculations allow for real-time swaying.
2. Set the value of [Force Multiplier] to 100%.
To add wind force, first set the [Force Multiplier] value to 100%.
(If you want to apply force to the opposite side, set to -100%)
3. Gradually increase the value of [Max Force] from 0.
The value of [Max Force] is first set to 0 and then gradually increased until the optimum value is reached.
Use the value at which the maximum sway range is reached and no change is observed.
TIPS
If the value of [Max Force] is set too high, the parameter may max out, resulting in jerky motion.
It is best to set the [Max Force] value to a line just below which no change in movement can be seen.
Example of wind parameter usage
By setting the [Force Multiplier] value to 100% for a few frames, the model can be made to blow in the wind.
Furthermore, by setting random or periodic values in the expression and continuously changing the [Force Multiplier] value over time, it is possible to create the effect of hair constantly blowing in the wind.
Example: wiggle(5,50)
The [Force Multiplier] value is set to 0, so that the force will change randomly within a range of ±50% five times per second.
By baking the result of the wind parameter with [Execute], you can see that the hair is moving randomly.
If you are concerned about the jerkiness of the movement, lower the value of [Max Force] or make other adjustments.
Adjust the swing of a specific output destination parameter
If you do not want to apply wind parameters to specific areas or if you want to partially adjust the strength, adjust the degree to which physics is applied.
The sway of specific output destination parameters can be adjusted from [Physics] > [Output] > [Parameters].
The following video illustrates adjusting the impact on the brim of a hat.
See “About physics” for more information.