I created a script that allows me to change my meshes configuration while the app is running. I don’t know meshes all that well and am running into issues with texturing. How do I need to set my uv’s so that my texture shows correctly? There’s likely other issues too so please bear with me.

custom 10×10 mesh is on the left, standard plane right

script

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class UpMesh : MonoBehaviour
{
    public int width = 1;
    public int height = 1;

    private Vector2 _lastSize = Vector2.zero;
    private Mesh mesh;


    private void Start() {
        _lastSize.x = width;
        _lastSize.y = height;
    }

    void OnValidate() {
        if(Application.isPlaying != true) return;
        if(width == _lastSize.x && height == _lastSize.y) return;
        
        MakeMesh();
    }

    void MakeMesh() {

        mesh = GetComponent<MeshFilter> ().mesh;

        Vector3[] vertices = new Vector3[4 * width * height];
        Vector4[] tangents = new Vector4[4 * width * height];
        Vector2[] uv = new Vector2[4 * width * height];
        int[] triangles = new int[6 * width * height];

        var uvH = 1f / height;
        var uvW = 1f / width;

        for(int col = 0; col < width; ++col) {
            for(int row = 0; row < height; ++row) {
                int index = row * width + col;
                float x = transform.position.x - width/2;
                float y = transform.position.y;
                float z = transform.position.z + height/2;

                vertices[index*4 + 0] = new(x + col,         y,     z - row);
                vertices[index*4 + 1] = new(x + col+1,       y,     z - row);
                vertices[index*4 + 2] = new(x + col+1,       y,     z - row-1);
                vertices[index*4 + 3] = new(x + col,         y,     z - row-1);

                tangents[index*4 + 0] = new(1f, 0f, 0f, -1f);
                tangents[index*4 + 1] = new(1f, 0f, 0f, -1f);
                tangents[index*4 + 2] = new(1f, 0f, 0f, -1f);
                tangents[index*4 + 3] = new(1f, 0f, 0f, -1f);
                

                uv[index*4 + 0] = new(col + col*uvW + uvW,        row + row*uvH);
                uv[index*4 + 1] = new(col + col*uvW,              row + row*uvH);
                uv[index*4 + 2] = new(col + col*uvW,              row + row*uvH + uvH);
                uv[index*4 + 3] = new(col + col*uvW + uvW,        row + row*uvH + uvH);


                triangles[index*6 + 0] = index*4 + 0;
                triangles[index*6 + 1] = index*4 + 1;
                triangles[index*6 + 2] = index*4 + 2;
                triangles[index*6 + 3] = index*4 + 0;
                triangles[index*6 + 4] = index*4 + 2;
                triangles[index*6 + 5] = index*4 + 3;
            }
        }

        mesh.Clear ();
        mesh.vertices = vertices;
        mesh.tangents = tangents;
        mesh.triangles = triangles;
        mesh.uv = uv;
        // mesh.Optimize ();
        // mesh.RecalculateNormals ();

        Debug.Log($"MAKE {height}x{width} v{vertices.Length} t{triangles.Length}");

    }
}

texture