Generally you want to evaluate the settings for each mesh to use the fewest vertices possible, but we'll consider a way to apply it to multiple meshes.

Have to +1 this. Trace is very handy for outlining hand animated effects so they fit optimally in the spritesheet. A 'mass trace' even at the expense of extra vertices per piece would be handy as well.

Discussed this on the Discord server, will be useful to have this feature in future updates of trace-all in a batch with some general parameters, which will save tons of time in some scenarios where you are handling +100 images. It doesn't matter if some meshes don't look perfect after the batch, we can revise it manually on specific cases and still save time. Thanks!

Hi, any news on this? It will be a very nice feature to have and time saving for us the animators

JulioD Unfortunately, no concrete progress was made, but I realized that we had not yet added this idea to our roadmap, so I created an issue for it: EsotericSoftware/spine-editor852
You can subscribe to this issue ticket to receive notifications when there is any progress on this issue.

我认为这是一个很好的功能，其一是能批量追踪多个网格，哪怕只是粗略地描出外边，也能大大节约时间；其二是对于使用多边形打包的情况而言，在项目初将所有附件自动追踪描出外边，之后就可以大致测算打包时缩放的参数有没有超出项目要求，进而调整ps内尺寸或者缩放的参数

希望能尽快实施，这个功能的确是相当有帮助的