use the uploaded image as a locked base do not change geometry layout or proportions refine materials only stone soft warm gray beige limestone very subtle movement low contrast matte honed no strong veining no horizontal striping no mottled texture fluted wall maintain exact spacing increase realism slightly subtle shadow depth avoid over perfect uniformity tub change finish to matte warm white keep exact shape and size remove any remaining outline lines any sketch like edges lighting soft natural daylight slight directional shadow for depth no added decor added fixtures new architectural elements
