Eye Shader Displacement

I have searched every way I can to find out what the hell is going on with Epic’s displacement image in the eye material in Content Examples, and I have come up with nothing. It makes no sense. The image is listed and used as a Texture2D, but exports as a HDR image. Its size is 256 from an imported 1024, but the maximum texture size hasn’t been touched. Importing it into another project with the same settings is impossible unless you migrate it, which means that I can’t replicate the texture in any manner. If someone has any ideas as to how this texture is created, please tell me. I’ve replicated everything else in the material and it all works, except this one thing, which is infuriating.