[INFORMATION](4/25/2024)
Cubism Editor 5.1 alpha3 is now available!
We have incorporated some of your comments and suggestions. Thank you for your comments and requests!
We will continue to welcome your feedback on alpha3.
Download/
Manual and Update History
What is that weird trail? and How do I fix it? (This is my first time using live 2d)
Answers
It's Deform Paths. I leave the explanation to the official manual.
https://docs.live2d.com/en/cubism-editor-manual/deformpath/
If you want to disable it, go to Show>Onion Skin>Modeling View to get rid of the trailing images.
or clicking here