architectural backdrop background barrier blocks brown coloring colouring constructed craftsmanship decorative designed distinctive edges exterior external fitted interconnected interlinked linear lines mosaic patterned perspectives rectangular secure shaped shapes slabs smooth solid stone stones stonework strength strong style surface surfaces texture textures thick thin uneven variations variety wall wallpaper well-built brick brick-wall bricks brickwork cement colors colours façade firm mortar perspective security standard surfaced textured traditional-brick-wall variation varied various walled abstract builders building concrete construction-work holes hollow rough corner corner-wall fixed merger merging mixed repaired basic color colored colour coloured covered covering green Rendered rendering windows colorful colourful construction contrast cutouts decorated decorations gray grey