abstract appearance background brown colored coloring colors coloured colouring colours conglomerate contours contrast contrasts cracks fissures flaws grit gritty layered layers levels light lines mica natural rock rock-face rockface rocky rough rugged shade shadows shape shapes silicate stone strata stratum sunlight sunny sunshine surfaces texture textured textures veins wallpaper angles architectural building construction cover covered edge edges edging elements exterior external height high linear maintenance modern orange patterns perspectives placement renovating renovation repairs roof roof-area roofing rooftop roofwork rooves rows stack stacked stacks style surface terracotta tiles tiling work shaped