please enhance this architectural pool rendering with a photorealistic approach while maintaining all existing design elements specifically 1 water rendering replace the current pool surface with crystal clear photorealistic water apply realistic light refraction and caustic effects to showcase the pool s mosaic floor design ensure water transparency allows complete visibility of the irregular mosaic flower pattern at the pool bottom without any modifications to the existing design 2 material texture preservation keep all current colors textures and geometric forms intact ensure the irregular mosaic flower pattern which is an integral part of the pool design remains unaltered and properly visible through the transparent water 3 lighting enhancement implement advanced photorealistic lighting with improved natural daylight simulation with realistic sun positioning and soft shadows enhanced ambient occlusion for depth and dimensionality realistic reflection and refraction on all water surfaces subtle caustic light patterns that reveal the pool s mosaic design without overshadowing the architectural composition color temperature correction for warm inviting natural light 4 overall visual polish achieve a photorealistic aesthetic across all elements architecture materials landscape and water while maintaining the design intent and color harmony of the original visualization