Init It is true that using RenderTexture may adversely affect performance, which is why it is generally recommended not to use it all the time, but only temporarily when needed. If you do this, I doubt it will have much of a negative impact on performance, although it depends on how many skeletons in the scene use RenderTexture. In general, performance issues always need to be tested on the actual target device to be sure. If you test it and find an unacceptable negative impact, you can talk to us again.
There is an example scene that uses RenderTexture, so you may want to refer to it: Spine Examples/Other Examples/RenderTexture FadeOut Transparency
Also, check out the example scripts in the Spine Examples/Scripts/Sample Components/SkeletonRenderTexture folder.
