I make clothes for a women's tuxedo. I just have a problem: how can I fix the distortions on the bottom of the short skirt? I recorded a video for convenience, watch it carefully in the highest possible quality:
https://youtu.be/GratG_EYMa8
I made this skirt short by simply cutting off the pencil skirt from the base game.

I tried to fix this skirt with fixes in TS4CASTools, but it was useless.
skirt files
How to fix it?