I just do as the document in https://developer.apple.com/documentation/shadergraph/realitykit/cube-image-(realitykit)
I have a .ktx file, and use CubeImage node to load it, then Convert node, but it shows black.
I check it on my Vision Pro, it's still black, I don't know why? Is it something wrong?
ps: I also use Image node to load .ktx file, it shows one image, so I belive .ktx file is right. I alse checked it on Vision Pro.