当设置为“出血”时，直线alpha图形的文件大小会更大，因为它们在透明区域中包含RGB信息。 这很重要，否则你会在直的alpha纹理上获得黑色边框。
Straight alpha graphics will be larger in file size when set to Bleed, because they contain RGB information in the transparent areas. This is important, otherwise you would get black borders at straight-alpha textures.
无论如何，输入文件大小并不重要，它将取决于您在Unity中配置纹理压缩的方式，它决定了已部署应用程序中的文件大小。
Anyway, input file size does not matter much, it will depend on how you configure texture compression in Unity which determines the file size in the deployed application.
您描述的设置是正确的。
请参阅有关Premultiplied-vs-Straight-Alpha的spine-unity文档中的新部分以及Unity中的正确导入设置：
spine-unity Runtime Documentation: Advanced Premultiplied vs Straight Alpha Export
spine-unity Runtime Documentation: Advanced Premultiplied vs Straight Alpha Import
The settings you described are correct.
Please see the new sections in the spine-unity docs about Premultiplied-vs-Straight-Alpha and correct import settings in Unity:
spine-unity Runtime Documentation: Advanced Premultiplied vs Straight Alpha Export
spine-unity Runtime Documentation: Advanced Premultiplied vs Straight Alpha Import
