Hi, you need to rework your image: for Bryce, it needs to have twice the width, if you want to map it onto a sphere (parametric!). In your graphics-program, simply expand one of its side margins by image-width and then map it parametric to the sphere. Also adapt your transparency(alphachannel)-image for the second image-slot to those size-changes. (Dont forget to checkmark the "blend-transparency" in the material and to set the transparency-dot in the MatLab to that Slot). H.

"All that we see or fear, is but a Sphere inside a Sphere."     (E. A. Pryce -- Tuesday afternoon, 1845)