Texture2DArray GenerateTextureArray(Texture2D[] textures)
    {
        Texture2DArray textureArray = new Texture2DArray(
            // width, height, depth, format, mipmap
            textureSize, textureSize, textures.Length, textureFormat, true
        );

        for(int i = 0; i < textures.Length; i++) {
            textureArray.SetPixels(textures[i].GetPixels(), i);
        }
        textureArray.Apply();
        return textureArray;
    }