make these custom blocks cement and char them a bit make the wood beams charred make the grass a bit charred aswell and make the river look realistic make the shadows coming from the holes on the blocks look realistic too there is no roof so showcase natural light make it sunny there is no roof anymore just the beams so make it sunny make the piece of wood near the opening of the river charred wood as well and split it a bit to make it look like it was in a fire also get rid of the door and make it look like a burnt apeture
