An interface is needed to create a room from an external source.

[DanilinSA]

Is your feature request related to a problem?

Currently, rooms are only created manually from tiles. This works well for small maps. If the map becomes large (for example, 1024 * 1024 tiles), then drawing manually becomes extremely difficult. A mechanism for creating a tile map from an external source is needed.

Describe the solution you'd like

The "tile map export" mechanism - export from a file (CSV, JSON, ...)

Describe alternatives you've considered

I tried to edit "*.yy" files directly. This is a bad way. The slightest mistake breaks the project.

Additional context

No response

[rwkay]

you can import a tilemap from a picture (it will create a tileset for you from that) - in the Room Editor look at the Room Menu at the top and then select Convert Image to Tilemap - see https://gamemaker.io/en/blog/practical-guide-tiles and the automatic tile imports.

Alternatively you could use the other external editors that support GM I believe Tiled supports exporting to GM

[DanilinSA]

I know this. But I have a ready-made "TileSet" and I need to form a map according to a certain complex rule. And then finish it manually.