I create an animation with a plane is transforming to a sphere by using the method describing by @leon-cheung in this topic.
I want to apply the two modifiers (Bend in Simple Deform) as shape key but the result is not indentic.
It seems that it is the second modifier which is the problem.
There are no problem if I use only one modifier with an angle less than 180°.
Is there a way to have the same result (animation transforming plane to sphere ) by using shape keys?
This is the file about my question :


