Skybox looks wrong for the Mip-1 (the clearest one)?

platform: iPhone6 iPhone5s

I guess maybe the premultiplyalpha of the cubemap’s 6 images cause it ?

This problem, I think, is device-dependent… On PC it looks right in the editor, launch, publish…
But when on my iphone5s|iphone6 it turns to be the image i posted there…