How to Install a FiveM MLO (Interiors and Map Mods)

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Installing a FiveM MLO (custom interiors and map mods) is simple once you know the steps. This tutorial walks through stream folders, ymap/ytyp files and testing in-game.

MLOs (map load objects) replace or add interiors and buildings on the GTA map. A good MLO transforms a generic location into a believable roleplay hub. Installing one is simple once you understand the stream folder.

What is inside an MLO

A typical MLO resource contains a stream folder with ytyp, ymap, and ydr/ydf files, plus a fxmanifest.lua. The ytyp defines the archetypes, the ymap places them in the world, and the model files hold the geometry and collisions.

Step 1 — Drop it into resources

Place the MLO folder in your server's resources directory, ideally inside a category folder like [maps]. Keep the folder name clean and lowercase to avoid path issues.

Step 2 — Ensure it in server.cfg

Add ensure your-mlo-name to server.cfg. If the resource is inside a bracketed folder like [maps], ensure the folder once and FiveM loads everything inside it. Restart the server and watch the console for manifest errors.

Step 3 — Verify the fxmanifest

A correct fxmanifest declares the stream files with this_is_a_map 'yes' and data_file entries for the ytyp. Most quality MLOs ship this correctly; if your interior loads but has no collision, a missing or wrong manifest is usually why.

Step 4 — Test in-game

Teleport to the interior location and walk through it. Check for:

• Missing collisions (falling through floors or walking through walls)
• Z-fighting or flickering textures
• Props that fail to load at distance

Common problems and fixes

• Invisible walls or no collision: the ybn collision file is not streaming, or the manifest is incomplete
• Interior does not appear: another resource is occupying the same map location, or the resource was not ensured
• Texture flicker: a conflicting ymap from another mod is overlapping the same coordinates

Avoiding conflicts

Two MLOs targeting the same location will fight each other. Install one interior per location and remove default or competing map mods first. Track which MLO owns which coordinates so you never double-book a spot.

Performance note

Heavy MLOs with thousands of props can hurt client FPS. Optimized MLOs use LODs and occlusion so detail loads only when needed. When choosing interiors, favor well-built, performance-conscious maps over raw prop count — your players' frame rate will thank you.

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Get started: Browse ready-to-use MLOs & maps, or get a complete premade FiveM server with MLOs already installed.