Generating world using 3d cubes, alternatives, performance issues.

Unity Engine
1

I’ve spent the day generating worlds using terrain, custom meshes and cubes. I want to achieve a look similar to Kingdoms and castles (Kingdoms and Castles on Steam)

using terrain or custom mesh with perlin noise did not really work since I could not get the 90 degree angles I need to achieve the look. I ended up getting the map generator that uses cubes to work, code looks like this:

public void GenerateMap()
    {
        DestroyTiles();

        float[,] noiseMap = Noise.GenerateNoiseMap(mapWidth, mapHeight, noiseScale);

        for (int x = 0; x < mapWidth; x++)
        {
            for (int y = 0; y < mapHeight; y++)
            {
                int posX = x * 10;
                int posY = y * 10;

                Tile tile = new Tile(posX, posY);

                if (noiseMap[x, y] >= waterAmount)
                    tile.gameObject = Instantiate(grassTile, new Vector3(posX, 0, posY), Quaternion.identity);
                else
                    tile.gameObject = Instantiate(waterTile, new Vector3(posX, 0, posY), Quaternion.identity);

                tiles.Add(tile);
            }
        }
    }

Basically I can choose a scale and wateramount, and end up with a map like this:

5206496--518069--Screenshot_5.jpg
5206496--518069--Screenshot_5.jpg1638×801 61.7 KB

I quite like the look, however, if I go over a size of 50x50 (each tile is 10 meter squared), Unity gets quite slow. So obviously this is not a scalable or performant approach.

Can anybody either show me an approach that gets a similiar effect to this using a single mesh, or advice me on how I can make my current setup more performant?

2

I think the problem is, that you spawn in too many meshes, combining the meshes to a big one should fix it.