Robert, i tried to put 2 image, one high stretched and one linear stretched on the bulge ... i hope this give a response to your interesting question:
No elaboration on this 2 image:
http://www.starkeeper.it/img/L_Core_NoStr.jpg
http://www.starkeeper.it/img/L_HiStr.jpg
Please let me know your consideration about.
All the best,
Leo