一般来说，请始终提供显示您实际问题的屏幕截图，用文字描述此类问题几乎总是模棱两可，如果我们从中文翻译成英文更是如此。
虽然机器翻译使用“抗锯齿”一词，但我认为您的问题不在于抗锯齿创建半透明像素。抗锯齿会创建一个宽度仅为单个像素的半透明像素区域，这应该不是问题。如果这是一个问题，那么理论上你可以通过增加图集纹理分辨率来解决这个问题，减少屏幕上 1px 半透明边框的显示尺寸。
如果您的意思是在使用 Photoshop 绘图时，您会收到更大的多个透明像素的半透明羽化区域（使用大多数画笔时，与铅笔工具相比），那么解决方案是在 Photoshop 中相应地调整您的画笔以产生小衰减区域，或使用较小的刷子清理边界。
在技术方面，您只能设置一个阈值，因此您需要相应地调整您的艺术。如果轮廓和无轮廓部分具有相同的 alpha 值，它将平等对待它们。
In general please always provide screenshots that show your actual problem, describing such issues with words will almost always be ambiguous, even more so if we translate from Chinese to English.
While the machine translation is using the wording "anti-aliasing", I do not think that your problem is with antialiasing creating the semi-transparent pixels. Anti-aliasing would create a semi-transparent pixel area with the width of only a single pixel, which should not be a problem. If it's a problem, then your could theoretically solve this by increasing the atlas texture resolution, reducing the displayed size of the 1px semi-transparent border on-screen.
If you mean that when drawing with photoshop you receive a larger semi-transparent feathering area of multiple transparent pixels (when using most brushes, compared to the pencil tool), then a solution is to adjust your brush in photoshop accordingly to have a small falloff area, or use a smaller brush and clean up your borders.
On the technical side of things you can only set one threshold, as a consequence you need to adjust your art accordingly. If both outline- and no-outline parts have the same alpha value, it will treat them equally.
