private void AddConvex(Vector3 pos)
    {
        Vector3[] verts = new Vector3[20];
        for (int i = 0; i < verts.Length; i++)
        {
            float x = Random.Range(-1f, 1f);
            float y = Random.Range(-1f, 1f);
            verts[i] = new Vector3(x, y);
        }

        ConvexMesh convex = ConvexMesh.AddConvexMesh(pos, verts, Space.Self, material);

        convex.SetTexture(uvGridTexture);
    }