Blueprint Builder¶

Open the editor window from:

Tools > Dungeon Master > Blueprint Builder

The Blueprint Builder is the main authoring tool for Dungeon Master.

Generation Settings¶

Setting	Description
Layout Asset	Existing DungeonLayoutAsset to edit or regenerate.
Room Count	Total number of rooms to generate.
Use Random Seed	Uses a changing seed when enabled.
Seed	Fixed seed used when random seed is disabled.
Min Room Size	Smallest generated room footprint in grid cells.
Max Room Size	Largest generated room footprint in grid cells.
Room Spacing	Minimum gap between placed rooms.
Layout Spread	Adds extra random breathing room during room placement.
Max Corridor Length	Maximum preferred corridor path length during generation.
Branch Chance	Controls how often new rooms branch away from earlier rooms.
Secret Chance	Chance for eligible leaf rooms to become secret rooms.
Locked Door Chance	Chance for connections to become locked doors.
Empty Room Decoration Chance	Chance for empty normal rooms to receive decoration markers.
Loop Chance	Chance to add extra loop connections between rooms.

Blueprint Preview¶

The preview displays the generated dungeon as a 2D layout:

• Rooms are colored by type.
• Connections are colored by connection type.
• Click a room to edit it.
• Use the zoom slider to inspect larger layouts.

Room Types¶

Type	Purpose
Normal	Empty room with no special behavior.
Entrance	Start room.
Exit	Final room.
Encounter	Adds an enemy spawn marker by default.
Treasure	Adds a chest marker by default.
Boss	Adds a boss spawn marker by default.
Puzzle	Reserved for your own puzzle logic.
Secret	Adds a chest marker and configures a secret connection by default.

Editing Rooms¶

When a room is selected, you can edit:

• Name
• Type
• Grid Position
• Room Size
• Content Markers

Changing a room type applies useful defaults:

New Room Type	Default Marker
Encounter	Enemy Spawn
Treasure	Chest
Boss	Boss Spawn
Secret	Chest

Changing a room to Secret also converts its first connection to SecretDoor and other connections to Wall. If there is room beside the connected visible room, the secret room is moved next to it so the hidden wall behaves like a classic secret room entrance.

Content Markers¶

Content markers define where themed objects are spawned inside a room.

Marker Type	Theme Pool
Chest	Chest Prefabs
Enemy Spawn	Enemy Spawn Prefabs
Boss Spawn	Boss Spawn Prefabs
Trap	Trap Prefabs
Decoration	Decoration Prefabs
Custom	Custom Content Prefabs

Each marker has:

• Type
• Local Cell
• Local Offset
• Custom Id, when using Custom

Local Cell is relative to the room. Local Offset is a Unity world-space offset added after converting the cell to a world position.

Connection Types¶

Type	Build Result
Open	Uses the open passage prefab.
Door	Uses the door prefab.
Locked Door	Uses the locked door prefab and stores KeyId.
Secret Door	Uses the secret wall prefab and stores secret metadata.
Wall	Blocks the connection and is ignored by traversal validation.

Validation¶

The validation panel reports common layout issues:

• No layout assigned.
• No rooms.
• Missing entrance.
• Missing exit.
• Invalid room sizes.
• Duplicate room ids.
• Connections referencing missing rooms.
• Rooms unreachable from the entrance.

Validation is a design-time helper. It does not prevent you from building if you intentionally want an unusual layout.

Build 3D¶

The Build 3D panel controls scene generation:

Setting	Description
Theme Profile	Prefab mapping used by the builder.
Cell Size	Unity units per grid cell. Default is 4.
Wall Height	Reserved build setting for wall height-aware modules.
Clear Previous Build	Removes old generated children before building.
Doors On Both Ends	Places connection prefabs on both room ends instead of one.

Click Generate 3D Dungeon to build the scene.