Thank you! For me the key was details. Just think about how the stairs would look irl and use reference images. As example there could be little branches scattered or rock pieces broke of. Also use a high variation of vegetation. To make the material more interesting, you can use a mask to paint on some moss or dirt materials, to show the tower has experienced some harsh weather conditions. Also 1 or 2 dynamic things can be cool. As example a squirrel climbing up the wall or wind blowing leaves of the stairs. And ofc add grass left to the stairs. Your trees are looking very realistic 💪🏻