Display a 2D minimap with fog of war

The DungeonGridFlow prefab already comes pre-configured with the minimap. This is done with the GridFlowMinimap component:

Update FrequencyControl the frequency of minimap updates. The updates can run at a lower fps for better performance
Enable Fog of WarHides parts of the map that is not explored yet
See Through WallsIf this is disabled, unexplored area behind a wall will not be made visible. This works if Fog of War is enabled
Minimap TextureThe Render Target texture that the minimap will be rendered on
IconsThe icons to overlay on special tiles

Init Mode values:

On Dungeon RebuildThe minimap layout texture is regenerated when the dungeon rebuilds
On PlayThe minimap layout texture is generated when you start play
ManualThe minimap layout texture is generated only when you manually build it from script


The minimap requires you to provide a Render Texture asset in the Minimap Texture property. The minimap will be rendered in this texture. You can then apply this texture anywhere (in your UI elements, in a mesh etc)

Create a new Render Texture asset. Use the Create menu in the Project window: Create > Render Texture

Select the Render Texture asset and inspect the properties

Change the following:

SizeChange to 512x512 (or the quality you are comfortable with)
Depth BufferNo Depth buffer (we don't need it here)
Filter ModePoint (so we get sharp tile edges instead of a blurry image)

Assign this Render Texture asset to your DungeonGridFlow game object's minimap component

Dungeon Architect will automatically update this texture based on the specified Update Frequency. You can assign this texture anywhere on your UI. You can also attach it on a mesh

Show in UI#

Open the game sample scene: Assets/DungeonArchitect_Samples/DemoBuilder_GridFlow/Scenes/GridFlowBuilderDemo_Game

There's a UI canvas in the hierarchy. Expand and inspect it:

There is a RawImage Canvas Item in there. It was created like this:

Select the RawImage item and configure it like this:

The Render Texture was assigned there so it will show our minimap

Add to a Material#

While playing the sample game, if you look down, you notice the player holding a map in the hand (like in Minecraft). This map shows the minimap in realtime

The texture was simply added to an unlit material, and the material was then applied to that mesh

Create a Material as below:

  • Set the Shader to UI/Unlit/Transparent
  • Set the texture to your Render Texture asset

You can now apply this material anywhere (e.g. in a large billboard in your world, a small map that the player holds, dashboard of a vehicle etc)

See Also

Check the sample game to see how this was done

Tablet PrefabAssets/DungeonArchitect_Samples/DemoBuilder_GridFlow/Art/Prefab/Tablet_Map

Minimap Tracked Objects#

The minimap can track any object in the scene. You do this by adding the GridFlowMinimapTrackedObject component to the desired prefab

Added to the Player prefab

Added to the Enemy prefab

It has the following features:

  • The tracked object can explore the minimap (e.g. player and allies)
  • Specify an icon, color and scale of the object in the minimap
  • the icon can rotate to indicate the game object's Y rotation (good for player game objects)

You'd want to turn on Explores Fog of War only for the player and other relavant objects. The icon can be greyscale and you can apply a tint on it with different colors (e.g. on key icon but different colors applied to the red key prefab, blue key prefab and so on)

See Also

Check the sample game prefabs to see how the component was configured

Player ControllerAssets/DungeonArchitect_Samples/DemoBuilder_GridFlow/Scenes/DemoGameSupportFiles/Prefabs/GridFlowPlayerController
Grund NPCAssets/DungeonArchitect_Samples/DemoBuilder_GridFlow/Scenes/DemoGameSupportFiles/Prefabs/Enemy
Key (Red)Assets/DungeonArchitect_Samples/DemoBuilder_GridFlow/Art/Prefab/KeySkull_Red
Key (Blue)Assets/DungeonArchitect_Samples/DemoBuilder_GridFlow/Art/Prefab/KeySkull_Blue
Door (Yellow)Assets/DungeonArchitect_Samples/DemoBuilder_GridFlow/Art/Prefab/DoorLargeLocked_Yellow
Door (Green)Assets/DungeonArchitect_Samples/DemoBuilder_GridFlow/Art/Prefab/DoorLargeLocked_Green