Simple Unity script to preview various Perlin noise settings

Noise.cs

using UnityEngine;
using Unity.Mathematics;

public class Noise : MonoBehaviour {

    public int width;
    public int height;
    public float scaleX;
    public float scaleY;
    public float offsetX;
    public float offsetY;

    public bool useThreshold;
    public float threshold;

    public Color color;

    public void Generate() {
        var renderer = GetComponent<Renderer>();
        var texture = new Texture2D(width, height) {
            filterMode = FilterMode.Point,
            alphaIsTransparency = true
        };
        for (var x = 0; x < width; x++) {
            for (var y = 0; y < height; y++) {
                var color = CalcColor(x, y, offsetX, offsetY);
                texture.SetPixel(x, y, color);
            }
        }
        texture.Apply();
        renderer.material.mainTexture = texture;
    }

    Color CalcColor(int x, int y, float offsetX, float offsetY) {
        float xCoord = (float) x / width * scaleX + offsetX;
        float yCoord = (float) y / height * scaleY + offsetY;
        var sample = noise.cnoise(new float2(xCoord, yCoord));
        if (useThreshold) {
            if (sample >= threshold) {
                return color;
            }
            return new Color(0, 0, 0, 0);
        }
        return new Color(sample, sample, sample);
    }

    void OnValidate() => Generate();
}