GTA 6 Map Mods
Create custom interiors and map extensions, and edit Leonida's geometry with GTA 6 MLO and YMAP mods. Includes tools, install order and links to GTAModding.net.
Map mods alter GTA 6's static world geometry, whether by adding new interiors, replacing entire districts, constructing custom islands, or extending the coastline of Leonida. The two most used file types are MLO (multiple loaded objects - used for interiors) and YMAP (used for prop and decal placement).
MLO vs YMAP
MLOs are interiors (drug labs, custom safehouses, club venues) that replace or add to the existing ones and load in when you cross a trigger volume. They contain full geometry, materials, collisions and lighting. YMAPs are smaller in comparison, placing props, lights and decals in any free space without rebuilding interior geometry. Many bigger map projects include both: an MLO for the building, and a YMAP for the surrounding street furniture.
Install order matters
Map mods have the highest chance of conflicting because two mods will often try to exist in the same space. Install one map mod, load into the game, fly to the affected coordinate and confirm there are no issues before installing your next map mod. Use a mod manager that tracks YMAP files and MLO files separately. Collision-tool failures are the second-most common issue - always back up the engine's collision archive before performing any large installations.
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Complete maps listing on GTAModding.net - verified authors, free and paid mods, ordered by downloads and ratings.
Frequently asked
Maps FAQ
1What's an MLO in GTA 6 modding?
MLO is short for Multiple Loaded Objects - the streaming format used for interiors within the engine. An MLO mod is an added or replaced building interior, complete with collision, materials, navmesh and ambient light.
2How do I install map mods?
Most map mods come in the form of an RPF archive. Place the archive in your game's mods folder or merge it with the game using an RPF editor. Certain MLOs require a script-side trigger to be loaded, so please read the listing's description before installing.
3Do map mods break online play?
Map mods are for single-player only. Inserting a custom MLO or YMAP will trigger the anti-cheat in GTA 6 Online and could get you banned. Please use a separate, fresh install to play online officially.
4What's the best tool for editing maps?
Visual map editors such as the GTA 6 CodeWalker successor allow you to place YMAP props into 3D space. RPF editors pack archives. Blender with a community-created export plugin exports full MLO geometry.
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