I'm trying to make sense of how Simple Deform works. Right now it makes no sense to me.
First, if I make a cube, scale it down and subdivide it, then use the Simple Deform (SD from now on), I get the results I expect. Then if I create an empty and assign it to SD's Axis,Origin, I still get the results I expect (that is, I can tell beforehand how & why the mesh will deform).
Then if I make a plane, scale it twice along the X axis, apply scale, subdivide it and then use SD, weird things happen. First off, the plane remains unchanged with the Axis being X/Y (no Empty chosen yet). The same result happens when I assign an empty with no rotation.
Then if I rotate the empty 90 degree along the X axis, choose Axis as X, the plane now bend along the X axis, like this:
This makes no sense, becasue the empty's X remain unchanged because I rotate it along the X axis. The only thing changed is its Z aligns with the Global Y and its Y aligns with the Global Z. If the empty's X being unchanged, then why I coudn't achieve this result choosing the X as Axis with the empty before rotation?
Also, when I rotate the empty 90 degree only along the Y axis, choose Z as Axis, then it... twists instead of bending, like this:
In the SD tutorials, the speakers always rotate the empty 90 degree along X/Y axis and then use Simple Deform without explaining why they have to rotate the empty. For example: Simple Deform Tutorial