How to make transparent shirts
From Legacy Roblox Wiki
Important Note!
Please do NOT use this tutorial for making stolen shirts Transparent.
Things you need
1: An internet connection
2: Paint.net
3: An Image
Downloading Paint.net
Go to Paint.net - Download and choose one of the "download now" buttons. Click save or open and when the download is done you should have the installer screen up, follow the instructions until it says you are done installing Paint.net.