=== A) STARTFRAME (Referenz: echtes Foto des Wasserfalls) ===
Create a premium photorealistic vertical 9:16 image of an Icelandic highland waterfall in late winter, designed for a fullscreen Instagram Reel. Use the provided reference image as the spatial and visual ground truth.
MAIN SUBJECT: Show the wide curtain waterfall dropping into a dark basalt gorge clearly and prominently in the lower half of the frame. Keep its real width, drop height, rock shape and surrounding terrain accurate.
ENVIRONMENT: Include the snow-dusted plateau and the flat-topped ridge on the horizon behind the falls, and the braided river feeding the drop. Include the wet black basalt boulders, patches of green moss and the turquoise plunge pool in the foreground. Preserve the real geography of the gorge.
COMPOSITION: Vertical 9:16 fullscreen mobile composition, elevated viewpoint slightly above the lip of the falls. Place the waterfall centred in the lower two thirds, with the open sky filling the upper third. Create strong foreground-to-background depth.
TIME OF DAY: daylight, shortly before golden hour.
LIGHTING: bright natural daylight with warm low-angle sun grazing the ridge from the left, soft highlights on the snow, cool shadow in the gorge.
ATMOSPHERE: high thin cirrus clouds across a deep blue sky, dense spray mist rising from the plunge pool, clear visibility.
VISUAL QUALITY: Ultra-photorealistic professional photography. Extremely detailed. Realistic materials and reflections. High dynamic range. Professional full-frame camera quality. Sharp but not artificially oversharpened. No CGI appearance. No illustration.
CRITICAL FIDELITY: Preserve the reference environment as faithfully as possible. Do not redesign the waterfall. Do not invent new landmarks. Do not alter the geography. Do not add text, logos, labels or watermarks.
=== B) ENDFRAME (Referenz: das Bild aus Schritt A) ===
Same prompt as above, with the reference image replaced by the start frame from step A, and only these three blocks changed:
TIME OF DAY: deep night.
LIGHTING: realistic nighttime illumination only, no artificial light sources in the landscape, the scene lit by starlight and by the aurora itself, cold blue-green ambient light on the snow and on the water.
ATMOSPHERE: clear starry sky with a strong green aurora borealis arcing across the upper third of the frame, faint aurora reflection in the river and plunge pool, spray mist still rising from the falls.
Keep the waterfall, the gorge, the ridge line, the river bend, the boulders and the exact camera position identical to the reference image. Change nothing but the time of day and the lighting.
=== C) FLOW · FRAMES TO VIDEO (Bild A = erster Frame, Bild B = letzter Frame) ===
Use the first image as the exact start frame and the second image as the exact end frame.
Create one continuous cinematic timelapse of an Icelandic highland waterfall in vertical 9:16.
The camera perspective, framing, geography, terrain, gorge shape and all permanent environmental elements must remain consistent with the two reference images.
Keep the waterfall as the main visual anchor throughout the entire shot.
TIME PROGRESSION: Create a smooth accelerated transition from bright late-afternoon daylight into deep starry night with a full aurora display: daylight → golden hour → sunset → dusk → blue hour → deep night. The transformation must happen continuously and naturally, never as an abrupt scene change.
LIGHTING: The light evolves realistically throughout the timelapse. Sun position, ambient light, reflections, shadow direction, shadow length and overall color temperature change naturally with the progression of time. As night falls, the only light sources are starlight and the aurora, casting a cold green-blue glow on snow, rock and water.
ATMOSPHERE: Thin cirrus clouds drift and morph across the sky, the waterfall spray mist keeps evolving and rolling out of the gorge, and towards the end an aurora borealis slowly appears and dances across the sky in accelerated timelapse motion.
MOVEMENT: Animate the falling water, the churning plunge pool, the braided river and the drifting clouds in natural accelerated timelapse motion with subtle realistic motion blur.
CAMERA: One continuous shot only. Completely static tripod. Highly stable cinematic camera. Minimal parallax. No zoom. No cuts. No transitions. No sudden camera movement. No camera wobble.
ENVIRONMENT FIDELITY: Preserve the environment exactly. Do not redesign the waterfall. Do not add or remove rocks or landforms. Do not alter the geography. Do not create fantasy elements. Do not distort the landscape. Do not add text, logos, labels or watermarks.
QUALITY: Ultra-photorealistic. Premium cinematic timelapse. Natural lighting physics. Realistic atmospheric motion. Smooth temporal progression. Clean image stability. No flicker. No geometry warping. No scene reconstruction.
