Minecraft castle generator: walls, towers and keep in one .schem

Val des Cimes is the example world we publish for everyone to inspect. A medieval castle ringed by a moat stands above a village, in a forested valley with a river, flowering meadows and snowy peaks behind. It holds 10 buildings and 82 furnished rooms, all in real Minecraft blocks.

Any signed-in Spaleforce account can explore it in 3D and download it for free, as a Java world for Minecraft 26.1.2 and as a .schem. It shows the kind of scene the castle generator aims for:

Keep in mind that Val des Cimes is a large showcase, 1,024 blocks on each side. The worlds you generate yourself cover 512 × 512 blocks, and the generator is an experimental first version, so results vary with the prompt.

A castle prompt works best when it names a style, because the style decides the palette, the roof shapes and the wall thickness. Common directions include:

You can also attach a reference picture next to the prompt. Concept art of a fantasy castle or a photo of a real fortress gives the AI a silhouette, colors and a landscape to follow; the result is an interpretation, not a copy.

Castles cover a wide range of scales, so say what you need. A survival player may want a compact keep with a courtyard and a storage room. A server owner may want a castle big enough to hold the spawn, with room for NPCs and portals. An adventure map may need a full citadel with a village, terrain and paths.

The clearest way to steer the size is to describe the parts: how many towers, whether there is an inner courtyard, a moat, a village outside the walls. Choose "Build / structure" for a castle to paste into an existing map, or "Full world" when you want the valley, forests and river around it as a playable Java world.

Castles are usually where manual builds stall: the walls go up fast, then the roofs, interiors and surroundings take weeks. The generator treats the setting as part of the job. It shapes the ground first, places the architecture, then adds trees, rocks and vegetation drawn from a large library of real Minecraft structures and decor.

Every block is a real Minecraft block, and block states and water are checked before export. If a tower or a room is not what you wanted, select the blocks in the 3D viewer, describe the change, and a modification creates a new version while keeping the original.

Before downloading, open the castle in the 3D viewer. It uses the real Minecraft block models, so you can orbit around the spires and walls, or switch to first person to walk the courtyards and rooms, flying or on foot.

The download is a .schem file in the Sponge v3 format. Stand where you want the castle, run //schem load with the file name and then //paste. For a large castle, FastAsyncWorldEdit is a comfortable choice, and //paste -a skips air blocks if you are placing it over existing terrain.

Castle generation is included in Pro (€20 per month, 1 creation and 1 modification per month) and Ultimate (€50 per month, 5 of each). Each action uses 20 of the plan's daily AI credits; if a job fails, the credits and the monthly slot are returned.