Make business-shirt 6

 Next, create an unbuttoned state. It should look like this, but looks like an oil drum...

So I would like to squeeze the waist like this. The shirt in this state is flipped left and right same objects to improve the efficiency of the transformation program, but the picture itself is not symmetrical (buttonholes, etc.).  To do this, determine L&R with the script and automatically display the corresponding frame. 

Finished!