cirnogodot/Scripts/TilemapAvoidance.cs

using Godot;
using System;

public partial class TilemapAvoidance : TileMapLayer
{

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

		return false;
	}

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