RPG3DGamemaker is a game platform that I have made to be able to generate 3D RPG Games like DarkmoonRPG.

The usual DirectX 3D style is unsuitable for dungeon like environments.
In RPG3DGamemaker all worlds can be build with 2-dimensional maps of the dungeons together with 3D Backdrops (ceiling,floor) main walls, sidewalls, doors and stairs.

When the maps and worlds are made all characters, weapons, items and monsters can be entered into the game and the game can then be generated.