Create Texture2DArray

Texture2DArrayCreator.cs

public class Texture2DArrayCreator {
    [SerializeField]
    Texture2D[] textures;

    public Texture2DArray texArray = null;
    
    void CreateTexture2DArray()
    {
        int width = textures[0].width;
        int height = textures[0].height;
        int depth = textures.Length;
        TextureFormat format = textures[0].format;

        texArray = new Texture2DArray(width, height, depth, format, false);
        texArray.filterMode = FilterMode.Bilinear;
        texArray.wrapMode = TextureWrapMode.Repeat;
        
        for (int i = 0; i < depth; i++)
        {
            texArray.SetPixels(textures[i].GetPixels(), i);
        }

        texArray.Apply();
    }
    
    void Start(){
      CreateTexture2DArray();
    }
}