The download contains a PSD fill with built-in smart objects. So, you can put your design in these layers and you’re good to go! You can also change the background whatever you want, the file has high resolution of of 2800 x 2000 px /300dpi.
This is the opened version of our isometric psd square hardcover book mockup of you to showcase your book designs. You can add your own graphics with the help of the smart layer.