abstract appearance background banks birds black-&-white contrast contrasting cool dark duck dusk early-evening edge grasses greyscale lake lakeside light lighting monochrome outdoors peaceful reflected reflecting reflection reflections relaxing ripples rippling serene serenity shade shadow shadows silhouettes surface surfaces tranquil vegetation wader wading water water's-edge water-birds waterways art balls blue bubbles conservation cruise desktop drinks ecology float fluid foam graphic illustration liquid modern moisture quench recycling round smooth summer swirl texture thirst undulation vector wallpaper waves white angled atmospheric-humidity botanical-gardens cloud-forest conservatory conservatory-complex controlled- temperature cool-moist cooling curved curves curving dome domes energy-efficient environment flowers gardens glass glasshouse greenhouse heating high high-tech horticultural horticulture hothouse indoor-gardens mountain optimized-conditions plants regulated-climatic-conditions Singapore steel structure sustainable-building-technologies tall tallest transparent unique ventilation visibility warm-growing-environment waterfalls windows active activity artificial artificial waves bathers bathing board children enjoyment exercise fun generated generating motion movement paddle paddling parents people swimming swimming pool teens wave wave pool young adults young people youth aqua backdrop blurry color colored colors colour coloured colours distorted distortion flooded fuzzy lines outdoor outside patterns paving perspectives squared squares textures tiled tiles wet