A script to replace the tile sets used for the start node in a dungeon flow.

ReplaceStartTiles.cs

using DunGen;
using DunGen.Graph;
using UnityEngine;

public class ReplaceStartTiles : MonoBehaviour
{
	public RuntimeDungeon DungeonGenerator;
	public TileSet ReplacementStartTiles;

	private DungeonFlow originalFlow;


	public void Generate()
	{
		// Keep a reference to the original flow asset
		if (originalFlow == null)
			originalFlow = DungeonGenerator.Generator.DungeonFlow;


		// We make a copy of the dungeon flow before modifying any settings.
		// If we just modify the original, we'd permanently change the settings
		// on that asset in our project.
		// NOTE: This has to be done for any asset we want to modify (tile sets, archetypes, etc)
		// to avoid changing the original
		var modifiedFlow = Instantiate(originalFlow);

		// Find the start node, and replace all of the tile sets
		// with our replacement TileSet
		var startNode = modifiedFlow.Nodes[0];
		startNode.TileSets.Clear();
		startNode.TileSets.Add(ReplacementStartTiles);


		// Apply the modified flow and generate
		DungeonGenerator.Generator.DungeonFlow = modifiedFlow;
		DungeonGenerator.Generate();
	}
}