The image icons will need to be recreated because when you save, the only image which appears is the unrendered scene.  But that can be corrected by posing your character with the texture and render with a pixel resolution of 91x91 to start with.  Sizes can vary but you don't want to render too large, it will take up too much room in the library (but that is adjustable in P8).  Export the image as a png and replace the unrendered scene with the new rendered image.