If you want to "develop" or make items, you can create two main types: (2D) or UGC Accessories (3D).
How to create and sell your first 3D clothing item on Roblox Get Items On Roblox
Getting items on Roblox can mean two different things: creating your own items to sell or use, or acquiring existing items as a player. Here is how to do both. If you want to "develop" or make items,