Process-level overview of MLO creation. We don't click-walk through the steps - tooling changes regularly. The workflow's stable.

Step 1: 3D authoring

Build the interior geometry in 3ds Max or Blender. Walls, floors, props, custom lighting setup. UV map textures.

Step 2: Export

Export the geometry to GTA-compatible formats - YDR for the drawable, YBN for collision.

Step 3: Wire into the map

Use CodeWalker to place the MLO into the game world. Set the portal connecting external door to interior space. Tag the interior.

Step 4: Test and iterate

Load the modded game. Test entry, exit, lighting, audio. Iterate on issues.