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[About Cubism Editor / SDK 5.4 Alpha](Updated: July 14, 2026)
You can download the alpha installer from the dedicated forum below.
If you have any feedback regarding the alpha version, including feature requests or bug reports, please use the same forum.
Cubism Editor / SDK 5.4 Alpha Forum
https://creatorsforum.live2d.com/c/cubismeditorsdk54alpha/
[Regarding macOS Tahoe](Updated October 16, 2025)
macOS v26 Tahoe is now supported!
We advise against upgrading your macOS at this time as it may cause Live2D products not to function correctly.
Upgrading macOS can also cause you to lose your Cubism Editor license file.
Please make sure to deactivate your Cubism Editor license before upgrading the macOS.
For more details:
https://help.live2d.com/en/other/other_09/
You can download the alpha installer from the dedicated forum below.
If you have any feedback regarding the alpha version, including feature requests or bug reports, please use the same forum.
Cubism Editor / SDK 5.4 Alpha Forum
https://creatorsforum.live2d.com/c/cubismeditorsdk54alpha/
[Regarding macOS Tahoe](Updated October 16, 2025)
macOS v26 Tahoe is now supported!
We advise against upgrading your macOS at this time as it may cause Live2D products not to function correctly.
Upgrading macOS can also cause you to lose your Cubism Editor license file.
Please make sure to deactivate your Cubism Editor license before upgrading the macOS.
For more details:
https://help.live2d.com/en/other/other_09/
For inquiries regarding issues with license purchases or license activation errors, please contact us through the email form.
Complex Warp Deformer Performance Issue (and a tip to avoid it)
Steps to reproduce in Live 2D Cubism Editor 5.3.04:
1) Create a complex Warp Deformer (eg; 10x10 or more Divisions, Angle X + Angle Y with 5 keys each at -30, 15, 0, 15 30, and Extended Interpolation)
2) Create a very simple Warp Deformer* (eg; 2x2 Divisions, no keys)
3) Attempt to deform the simple Warp Deformer
This will incur the same deformation penalty as the complex deformer! However...
4) Put the complex deformer into its own Part (folder)
5) The performance is back!
* The performance hit affects other other types (like ArtMesh) and actions (like selection or movement) too
P.S. For the development team: surely this is a cache issue? The complex warp deformer is a sibling of the other parts in the root / parent part, but if it's not selected and not part of the hierarchy, any calculations on it can surely be skipped since it can't be affected? Unless siblings can affect warp deformers in ways i'm not familiar with. At the very least, moving a sibling part surely should not invalidate this cache? If it's a bounds recalculation then bounds of warp deformers should be cached instead of recalculated.
1) Create a complex Warp Deformer (eg; 10x10 or more Divisions, Angle X + Angle Y with 5 keys each at -30, 15, 0, 15 30, and Extended Interpolation)
2) Create a very simple Warp Deformer* (eg; 2x2 Divisions, no keys)
3) Attempt to deform the simple Warp Deformer
This will incur the same deformation penalty as the complex deformer! However...
4) Put the complex deformer into its own Part (folder)
5) The performance is back!
* The performance hit affects other other types (like ArtMesh) and actions (like selection or movement) too
P.S. For the development team: surely this is a cache issue? The complex warp deformer is a sibling of the other parts in the root / parent part, but if it's not selected and not part of the hierarchy, any calculations on it can surely be skipped since it can't be affected? Unless siblings can affect warp deformers in ways i'm not familiar with. At the very least, moving a sibling part surely should not invalidate this cache? If it's a bounds recalculation then bounds of warp deformers should be cached instead of recalculated.
Comments
Thank you very much for using our product.
First, please tell us about your PC environment.
- OS & Version: (e.g., Windows 10, macOS High Sierra)
- PC Model: (e.g., MacBook Pro 2017)
- Graphics Specifications: (e.g., GeForce GTX 950M)
- CPU: (e.g., Intel Core i7-7700)
- Memory: (e.g., 8GB)
- Illustration Software used: (e.g., Photoshop, Clip Studio, SAI)
Next, if possible, please store the model file experiencing the problem and the log file in the following data box.
https://biz.datadeliver.net/posts/WWvyD1kv4dMy
Please note that this data box is only accessible to the development team.
For instructions on how to obtain the log, please see here:
https://help.live2d.com/en/other/other_22/
Thank you for your cooperation.