material replacement petra chairs only replace chair upholstery with shearling wool fleece taupe beige keep exact geometry proportions and seams unchanged material settings base color warm beige taupe with subtle variation not flat texture soft dense fleece medium pile roughness 0 6 0 75 matte no shine normal bump 0 25 0 35 to get that fluffy depth slight color variation across surface very important rendering behavior soften edges slightly no sharp fabric edges add very subtle shadowing in creases keep lighting natural no extra glow do not do not change chair shape scale or position do not blur the texture do not make it too white keep warm tone
