ReRender

Make the stone look more porcelain-like with a refined texture and create realistic stone slabs. Adjust the lighting to resemble daylight so the photo appears more natural and less like a render, as it's noticeable that it's a concept/tender image. If possible, add small, subtle carvings to the top surfaces—nothing too noticeable or intrusive. Use an elegant but not overly bold brown or anthracite color. You can also add some lighting elements and a few flowers to the upper areas to enhance the overall appearance. Please do not change anything in terms of layout, positioning, or design.