Bake Animation from Physics

(Updated 10/28/2021)

Motion such as shaking set by physics can be baked as keyframes on the timeline in the animation workspace.
This allows parts of the body that have been moved by applying physics to be immediately added to the animation.


Physics Animation Bake Settings

Open the Physics and Scene Blend settings to see if physics is set.
For details on how to set up physics calculations, please refer to the “How to Set Up Physics Calculations” page.
Once you have verified that the physics are set up, move on to the animation workspace.

Before baking the physics, it is recommended to use scene blending to check for movement problems during scene playback.
For more information on scene blending, see the “Scene Blending Settings” page.


Number Image Detail
(1) Select the model track to which you wish to apply physics.
(2) Select [Animation] menu -> [Track] -> [Bake Animation from Physics] to open the settings window.
(3) When the [Physics Animation Bake Settings] dialog opens, select the parameters to which you wish to apply physics.
When settings are complete, click [OK].

The physics results are baked into the timeline as keyframes.
Play the scene and check for movement problems.

* If a keyframe has been previously set for the area to be baked, the result of the physics calculation will be overwritten.

Physics animation baking is a specification that bakes (burns) the results of physics calculations as keyframes when animating two rounds of a track from the beginning to the end of the track or the range where the key is struck, whichever is wider.

Therefore, the leading portion of the track may be affected by the aftermath of the trailing tremor.
If you don't want this to affect the animation, leave a long section without keyframes at the end of the track, and
cut off the excess after performing the animation bake.


Explanation of setting screens

Parameters to apply physics operations

A list of parameters for which physics is set is displayed.
By default, all parameters are checked.

Select all:
Select by checking all checkboxes.

Deselect All:
Uncheck and deselect all check boxes.


Keyframe insertion method

Automatically create optimal curves:
It recognizes the maximum and minimum values of the generated sequence of keyframes and automatically generates curves.
Although there is a slight error from the physical calculation results, it is easy to make adjustments after the curves are generated.
By default, it is set here.

Key in every frame:
Each frame reflects the results of the physics calculations, so the motion of the physics can be reproduced perfectly.
However, since a key is struck on every frame, it becomes difficult to adjust later.


Frame rate used in baking

Select the frame rate to be used for baking.

Physics Calculation FPS:
Baking is performed using the calculation FPS set in the physics calculation.

If the item is grayed out, return to Modeling and open [Physics and Scene Blend Settings].
The FPS information is stored in the model and can be selected.
* Cubism versions prior to 4.1.02 beta1 do not store the FPS information of physics calculations in the model.

Frame rate of the scene:
The frame rate of the scene set in the animation is used for baking.


Duplicate and save the scene before applying

Duplicate a scene with model tracks to which physics are applied, then apply the physics results to the original scene.
The duplicated scene will have the letters _COPY added after its name, allowing it to be used in a backup-like manner.
Use it to compare before and after application, for example.



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