Map an interior and stream it in FiveM

Custom interiors turn a generic GTA building into YOUR space - a police station, a gang hideout, a player apartment. This lesson walks the full pipeline from CodeWalker to in-game, covering the file types that confuse every beginner and the exact fxmanifest lines that make it work.

You'll build: A custom MLO interior mapped with CodeWalker, exported as a FiveM resource, and streamed into your server.
Time: ~40 minutes
You need: CodeWalker (free GTA V mapping tool), a local FiveM server, and basic understanding of YMAP/YBN files.
You'll learn: What MLOs are, how YMAPs and YTYP files define interiors, using CodeWalker to place and export interiors, writing the correct fxmanifest, and streaming the interior in-game.

BEFORE YOU START

Build it

Create the interior in CodeWalker

Your YMAP and YTYP files are exported.

Open CodeWalker, load the GTA V world
Navigate to the building you want to map (e.g., an empty warehouse)
Use the object browser to place walls, floors, furniture, lighting
Once satisfied, Export → select both YMAP and YTYP formats

Export names must match. If your interior is called my_interior, you get:

code

my_interior.ymap
my_interior.ytyp

Map an interior and stream it in FiveM

Build it

Create the interior in CodeWalker

Create the resource structure

Write the fxmanifest

Verify placement and fix issues

Keep reading the full lesson