Procedural Terrain?

Questions & Answers
1

Is it possible to generate terrain semi-procedurally or automatically? Not really sure what the proper terminology is…

Basically, I have a massive heightmap that outlines the general landmass. As opposed to carving out details totally by hand or adding a lot of random noise to it or something, would it be possible to draw out things like mountains and generate them procedurally, and save that data? I read about random generation of essentially infinite terrain at runtime, but is it possible to do it just to aid the development process as opposed to doing it at runtime?

3

This 3 tutorials cover all procedural terrain generation aspects in Unity:

Additional split terrain script:

Automatic grass placement:
https://doctrina-kharkov.blogspot.com/2019/08/unity-automatic-grass-terrain.html

2

Yes, and this has been done with Unity. Let me try to find the link. There was a video and everything. It was done really nicely.

A quick google search yielded it. And it is indeed called procedurally generated terrain. Head to page 2 and its at the bottom.

Here is another procedural generator.

4

Kind of late, but if you have terrain toolkit I’ve made a script to generate random textures/heightmaps using terraintoolkit:

using UnityEngine;
using System.Collections;

public class PerlinTerrain : MonoBehaviour {

    //Toolkit instance.
    [SerializeField]TerrainToolkit kit;
    //Array of textures.
	[SerializeField]Texture2D sandTexture;
	[SerializeField]Texture2D grassTexture;
	[SerializeField]Texture2D rockTexture;
	[SerializeField]Texture2D cliffTexture;

    void Start() {
        //Check if we have the kit assigned;.
        if (kit == null) {
            //If there is not an instance assigned or on gameObject, return.
            if (!GetComponent<TerrainToolkit>())
            {
                return;
            }
            //Else assign kit to gameObject's toolkit.
            else
            {
                kit = GetComponent<TerrainToolkit>();
            }
        }
        //Generate the terrain.
        Generate();
    }

	void OnGUI(){
		if (GUILayout.Button ("Generate")) {
			Generate();		
		}
	}

    public void Generate() {
        //Generate the perlin terrain.
        kit.PerlinGenerator((int)Random.Range(3,6),Random.Range(0.4f,0.9f),Random.Range(2,6), 1f);
		//Gives it a less smooth feel.
		kit.PerlinGenerator(4,4,4, 0.1f);
        //Creates arrays for stops.
        float[] slopeStops = new float[2];
        float[] heightStops = new float[4];
		Texture2D[] terrainTextures = new Texture2D[4];
        //Assigns values to the arrays.
        slopeStops[0] = 30f; slopeStops[1] = 70f;
        heightStops[0] = Random.Range(0.05f, 0.18f);
        heightStops[1] = Random.Range(0.19f, 0.49f);
        heightStops[2] = Random.Range(0.5f, 0.69f);
        heightStops[3] = Random.Range(0.7f, 0.89f);
		terrainTextures[0] = cliffTexture;
		terrainTextures[1] = sandTexture;
		terrainTextures[2] = grassTexture;
		terrainTextures[3] = rockTexture;
        //Paints the textures.
        kit.TextureTerrain(slopeStops, heightStops, terrainTextures);
    }

	public void Generate(bool doublePerlin) {
		//Generate the perlin terrain.
		kit.PerlinGenerator((int)Random.Range(3,6),Random.Range(0.4f,0.9f),Random.Range(2,6), 1f);
		//Gives it a less smooth feel.
		if(!doublePerlin){
			kit.PerlinGenerator(4,4,4, 0.1f);
		}
		//Creates arrays for stops.
		float[] slopeStops = new float[2];
		float[] heightStops = new float[4];
		Texture2D[] terrainTextures = new Texture2D[4];
		//Assigns values to the arrays.
		slopeStops[0] = 30f; slopeStops[1] = 70f;
		heightStops[0] = Random.Range(0.05f, 0.18f);
		heightStops[1] = Random.Range(0.19f, 0.49f);
		heightStops[2] = Random.Range(0.5f, 0.69f);
		heightStops[3] = Random.Range(0.7f, 0.89f);
		terrainTextures[0] = cliffTexture;
		terrainTextures[1] = sandTexture;
		terrainTextures[2] = grassTexture;
		terrainTextures[3] = rockTexture;
		//Paints the textures.
		kit.TextureTerrain(slopeStops, heightStops, terrainTextures);
	}
	
}