I am Trying to build a survival game using procedural Generation, successful in generating a Mesh, need help in Spawn and texture

I have create a Terrain using perlin-noise map, I am successful so far. But, now when i am trying to add texture, I can't figure out how. I am using using a colorMap to test, I want grass to have grass like texture instead of green color. Also, I want to spawn GameObject in certain area depending on heightMap (like Minecraft spawn bear in snow mountain). can someone help

HeightMap Generation Script

using UnityEngine; using System.Collections; public static class Noise { public static float[,] GenerateNoiseMap(int mapWidth, int mapHeight, int seed, float scale, int octaves, float persistance, float lacunarity, Vector2 offset) { float[,] noiseMap = new float[mapWidth,mapHeight]; System.Random prng = new System.Random (seed); Vector2[] octaveOffsets = new Vector2[octaves]; for (int i = 0; i < octaves; i++) { float offsetX = prng.Next (-100000, 100000) + offset.x; float offsetY = prng.Next (-100000, 100000) + offset.y; octaveOffsets [i] = new Vector2 (offsetX, offsetY); } if (scale <= 0) { scale = 0.0001f; } float maxNoiseHeight = float.MinValue; float minNoiseHeight = float.MaxValue; float halfWidth = mapWidth / 2f; float halfHeight = mapHeight / 2f; for (int y = 0; y < mapHeight; y++) { for (int x = 0; x < mapWidth; x++) { float amplitude = 1; float frequency = 1; float noiseHeight = 0; for (int i = 0; i < octaves; i++) { float sampleX = (x-halfWidth) / scale * frequency + octaveOffsets[i].x; float sampleY = (y-halfHeight) / scale * frequency + octaveOffsets[i].y; float perlinValue = Mathf.PerlinNoise (sampleX, sampleY) * 2 - 1; noiseHeight += perlinValue * amplitude; amplitude *= persistance; frequency *= lacunarity; } if (noiseHeight > maxNoiseHeight) { maxNoiseHeight = noiseHeight; } else if (noiseHeight < minNoiseHeight) { minNoiseHeight = noiseHeight; } noiseMap [x, y] = noiseHeight; } } for (int y = 0; y < mapHeight; y++) { for (int x = 0; x < mapWidth; x++) { noiseMap [x, y] = Mathf.InverseLerp (minNoiseHeight, maxNoiseHeight, noiseMap [x, y]); } } return noiseMap; } } 

MapGenerator Script

using UnityEngine; using System.Collections; public class TerrainGenerator : MonoBehaviour { public enum DrawMode { NoiseMap, ColorMap, Mesh }; public DrawMode drawMode; public int mapWidth; public int mapHeight; public float noiseScale; public int octaves; [Range(0,1)] public float persistance; public float lacunarity; public int seed; public int meshHeightMultiplyer; public AnimationCurve meshHeightCurve; public Vector2 offset; public bool autoUpdate; public TerrainType[] regions; float[,] noiseMap; public void GenerateMap() { noiseMap = Noise.GenerateNoiseMap (mapWidth, mapHeight, seed, noiseScale, octaves, persistance, lacunarity, offset); Color[] colourMap = new Color[mapWidth * mapHeight]; for (int y = 0; y < mapHeight; y++) { for (int x = 0; x < mapWidth; x++) { float currentHeight = noiseMap [x, y]; for (int i = 0; i < regions.Length; i++) { if (currentHeight <= regions [i].height) { colourMap [y * mapWidth + x] = regions[i].colour; break; } } } } MapDisplay display = FindObjectOfType<MapDisplay> (); if (drawMode == DrawMode.NoiseMap) { display.DrawTexture(TextureGenerator.TextureFromHeightMap (noiseMap)); } else if (drawMode == DrawMode.ColorMap) { display.DrawTexture (TextureGenerator.TextureFromColourMap (colourMap, mapWidth, mapHeight)); } else if (drawMode == DrawMode.Mesh) { display.DrawMesh (MeshGenerator.GenerateMesh (noiseMap, meshHeightMultiplyer, meshHeightCurve), TextureGenerator.TextureFromColourMap (colourMap, mapWidth, mapHeight)); } } public void CreateMob() { MobSpawner ms = new MobSpawner (noiseMap); ms.GenerateMod (); } void OnValidate() { if (mapWidth < 1) { mapWidth = 1; } if (mapHeight < 1) { mapHeight = 1; } if (lacunarity < 1) { lacunarity = 1; } if (octaves < 0) { octaves = 0; } if (meshHeightMultiplyer < 1) { meshHeightMultiplyer = 1; } } [System.Serializable] public struct TerrainType { public string name; public float height; public Color colour; } }