create a highly realistic 3d architectural render of a contemporary rear house extension that matches the existing property exactly in materials proportions and architectural detailing do not redesign or reinterpret the architecture accurately visualize the submitted design only materials and finishes main roof aa concrete roof tiles brickwork aa red brick matching the existing house important brick header detailing is only to be included directly beneath the gutters fascia of the main roof across the top of the new flat roof upstand parapet on the right hand side do not add brick headers above or around windows or doors the brick headers must match the same red brick colour and tone as the main house brickwork and new extension brickwork windows and doors white upvc or white aluminium frames gutters and downpipes white upvc include the new timber decking area exactly as shown remaining garden area to be simple natural grass only rendering style ultra photorealistic architectural visualization realistic uk residential lighting and atmosphere natural daylight with soft shadows accurate material textures and subtle weathering maintain realistic scale and proportions landscape restrictions no additional trees no hedges no shrubs or planting no rear screening vegetation no decorative landscaping no outdoor furniture unless already shown keep the rear garden clean open and minimal architectural references contemporary british residential extension premium realistic cgi render quality archdaily dezeen style realism clean understated believable residential architecture camera setup rear garden perspective eye level architectural camera slight wide angle lens with realistic proportions focus on material accuracy and integration with the existing house negative prompts no brick lintels above windows no extra brick detailing around openings no black window frames no modern charcoal cladding no extra landscaping no sunset or cinematic lighting no people no cars no unrealistic luxury styling