1. Adjusting the color of slots in the dopesheet does not have a significant impact on performance. The slot color is applied to the attachments in that slot, and this operation is relatively lightweight. The main performance considerations in Spine are related to the number of attachments, vertex transforms, and draw calls rather than the color adjustments.

2. Adjusting the slot color in the animation sheet (dopesheet) is generally fine and should not cause any significant performance issues. The color changes are applied per frame and are efficient. However, be mindful of the overall complexity of your animations, such as the number of meshes and vertex transforms, as these can have a more substantial impact on performance.

For more detailed information on performance considerations, you can refer to the Spine Metrics documentation.

Parktaehyoung I'm afraid I don't quite understand what you're asking. As Spinebot has already answered, changing the slot color does not significantly affect performance. If you are not comfortable with English, please post your question in the language you are most comfortable with. This forum has a translation button, and we can read your post through it.

Parktaehyoung I see, thank you for explaining the situation. This is just my guess, but I think the problem the programmer experienced was caused by using slot colors in the wrong way. Sometimes users don't know how to hide attachments, so they set the alpha value of the slot color to 0 to hide the attachment. However, when you do this, even if the attachment is not visible on the screen, the image is still drawn, resulting in unnecessary performance cost. (The correct way to hide an attachment is to add a slot attahcment key to hide it.)

Making the slot color black should not affect performance, but if you are duplicating and using a very complex mesh, the number of vertices may increase too much, so you may want to simplify the mesh attachments for the outline by reducing the number of inner vertices as much as possible.