cirnogodot/Scripts/TilemapAvoidance.cs

using Godot;
using System;
using System.Linq;
using Godot.Collections;

public partial class TilemapAvoidance : TileMapLayer
{

	[Export] private Array<TileMapLayer> _solidLayers;
	
	public override bool _UseTileDataRuntimeUpdate(Vector2I coords)
	{
		// if (_solidLayer.GetUsedCellsById(0).Contains(coords))
		// {
		// 	return true;
		// }

		return _solidLayers.Aggregate(false, (current, layer) => current | layer.GetUsedCellsById(0).Contains(coords));
	}

	public override void _TileDataRuntimeUpdate(Vector2I coords, TileData tileData)
	{
		tileData.SetNavigationPolygon(0, null);
	}
}