My wiki:Notice board
Introduction
You must have Builder's Club to upload these.
If so, you can have all the fun of working in a textile mill here in ROBLOX! I'm talking about making your own pants and shirts, either for yourself or to sell to your fellow ROBLOXians whose fashion sense or artistic skill might not be as great as your own.
Anyone can purchase new shirts and pants in the ROBLOX Catalog. However, creating and selling these exciting new products is an exclusive Builders Club privilege.
Getting Started
First go to your character customization page. Click the type of item you would like to create (Shirts or Pants). Then click "Create".
Now you’ll see a screen that looks like this:
First you need to download the shirt template to your computer. This is a picture that you draw on to create you own shirt. I personally use a very old version of Paint Shop Pro to create my shirts. You can use whichever image editing program you like. Paint.NET is a decent free one. GIMP is another. Some users will even use the plain old Microsoft paint program to make their shirts and pants.