edit the provided architectural visualization only modify the concrete planter boxes located on the lower terrace levels keep the exact same shape footprint width and length of the planters the only change is to reduce the height of their concrete side walls significantly transforming them into a very low curb approximately 5 6 cm high do not change anything else in the scene keep the pergola all building elements materials vegetation furniture lighting and overall composition exactly the same do not add or remove any objects do not redesign the terrace only shorten the height of the existing concrete planter walls on the lower terraces