Roblox Designs where Shirts and Pants are separate items

A lot of users asked us to make Shirts and Pants separable on Roblox designs. We are designing outfits that support that

Make it so the extended part of the pants like where the stomach would be doesn’t show up as a shirt when you download the file.For example the circled part of the image i am showing when you download it the green part shows up as part of the shirt.