create a fully photorealistic professional 4k product visualization using image 1 as the strict reference for the armchair and image 2 only as the upholstery material and colour reference change only the armchair s upholstery apply the exact louvre purple velvet fabric shown in the centre of image 2 to the entire seat and curved backrest match its precise deep muted plum purple colour fine texture softness tonal depth and subtle velvet sheen preserve the armchair s exact original geometry curved silhouette dimensions proportions seat thickness backrest shape contours seams edges frontal camera angle placement scale and composition do not redesign move resize or distort any part of the armchair keep the curved natural wood base completely unchanged including its original shape thickness warm wood colour grain texture and matte finish render the upholstery as premium dense short pile velvet with realistic microtexture subtle directional nap soft highlights gentle tonal variation across the curved surfaces accurate roughness natural material depth and realistic contact shadows the colour must match the attached louvre purple sample not burgundy red bright violet pink grey brown or black preserve the original clean white seamless studio background and centred product composition use soft professional studio lighting realistic global illumination balanced exposure natural grounding shadows accurate ambient occlusion crisp edges high quality anti aliasing and physically accurate materials produce an ultra realistic premium furniture catalogue image in professional 4k quality negative instructions change only the upholstery material and colour no geometry changes no shape changes no camera changes no altered wood base no additional cushions no tufting no buttons no new seams no legs no accessories no people no fabric samples no labels no text no logos no watermark no background changes no plastic looking velvet no excessive gloss no blur no noise and no artificial ai appearance
