enhance the image as follows quality improve overall image quality to 4k ultra hd make the image photorealistic natural lighting sharp but realistic details refine materials and textures where needed travertine slabs replace existing stone slabs with travertine slabs in the largest possible realistic format use large format slabs with minimal joints clean high end look strict area rule only apply changes to surfaces where stone slabs already exist do not add travertine to new areas do not extend or create new surfaces important keep the original layout shape and boundaries of the slabs maintain realistic alignment perspective and proportions realism travertine must look natural pores subtle color variation authentic texture correct lighting shadows and reflections slight natural imperfections not too perfect do not change do not modify any other objects or elements do not change furniture architecture or environment do not alter overall composition or layout goal a highly realistic 4k image with premium large format travertine slabs only where slabs already exist seamless minimal joints and fully natural
