The Sims 4 Studio Is a Free And Versatile Tool For Making Custom Content.
Using this tool you can make your own custom hair, hats, and accessories, you can modify EA clothing and shoe meshes, and you can recolor objects, CAS items (clothes, accessories, hair, etc), walls, floors, and terrain paint. You can also make animations and poses to play in CAS or in the main game. Additionally, Sims 4 Studio is able to edit resources within a .package using the Warehouse tab (resource editor tab) and it can merge multiple .packages into a single .package.
Their team goals are to facilitate the creation of game-safe custom content and to support a free, friendly, creative Sims 4 Community.

How to download sims 4 studio.
- Get registred on forum. HERE. It is easy, quick, free, and open to everyone.
- Once Registred, download HERE.
- For Beta version of Sims 4 Studio for Windows: Sims 4 Studio (Wishes)
- For Beta version of Sims 4 Studio for Mac: Sims 4 Studio (Candy Apple)
For modify meshes you will need blender.
BLENDER 64 Bits.
BLENDER 32 Bits.
You do NOT need Blender to do recolors