FiveM MLO Hosting: Custom Interior Maps for Your RP Server

The difference between a generic FiveM RP server and one that feels like a custom world is often the MLO count. MLOs (Map Long Objects, also called YMAP/YTYP assets) are custom interiors - a police station interior that matches the building's exterior, a custom apartment complex, a unique nightclub space. They make the GTA V map feel inhabited and personalised.

Understanding MLO Files

MLOs consist of:

• .ymap - World placement data (where the interior sits)
• .ytyp - Type and archetype data (what it looks like)
• .ytd - Texture data (optional, for custom textures)
• .ybn - Collision data (walkable floors, walls you can't pass through)

These files are streamed to connected players. Both the server and clients must have the files.

Installing MLOs as FiveM Resources

Create a resource folder for each MLO package:

resources/
  [maps]/
    police-station-mlo/
      fxmanifest.lua
      data/
        stn_pd_map.ymap
        stn_pd_map.ytyp
        stn_pd_collision.ybn

fxmanifest.lua for a map resource:

fx_version 'cerulean'
game 'gta5'

this_is_a_map 'yes'

files {
    'data/*.ymap',
    'data/*.ytyp',
    'data/*.ybn',
    'data/*.ytd'
}

data_file 'AMBIENT_SCRIPT_TRIGGER_METADATA_FILE' 'data/*.ymap'

Add to server.cfg:

ensure police-station-mlo

Performance Impact of MLOs

Each MLO is streamed to every nearby player. Large or complex MLOs with high polygon counts and multiple texture files increase:

• Bandwidth usage - Initial stream download per player
• Client render load - Lower FPS for players with weaker GPUs
• Server-side entity tracking - Objects in MLOs are entities

Best practices:

• Keep individual MLO file size under 50 MB when possible
• Do not exceed 30 - 40 active MLO resources on a single server
• Disable street objects in .ymap files that overlap with the MLO interior

Sourcing MLOs

Community-created MLOs are available from:

• Cfx.re community forum - Free releases
• Tebex/Creator stores - Paid professional MLOs ($5 - $100+)
• Discord communities - Direct creator contact

Paid MLOs consistently have better polished textures and clean collision data. For your server's primary locations (city hall, police station, hospital), investing in a quality MLO is worth the cost.

Host your MLO-rich FiveM server on Space-Node

MLO interiors quick answers

If players report missing interiors or long loading screens, test for resource overlap, duplicate YMAP assets, and start-order conflicts first.