手機幕後花絮影片：劇組在巨大水槽中拍攝微縮鐵達尼號沉沒，真實海水轟然沖過佈景，Seedance 2.0 提示詞

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幕後手機影片，拍攝於大型實景特效攝影棚內，以現代智慧型手機手持直向拍攝。

>> 場景背景：電影劇組正在拍攝 RMS Titanic 微縮模型沉沒的場景。一座巨大的實景海洋水槽布景被佈置成北大西洋的樣子，水槽內有一艘 1:24 比例的 Titanic，細節完整，包括亮起燈光的舷窗、四座煙囪、救生艇、甲板欄杆、索具、貨物起重機和微型乘客。水槽上方有一座鷹架吊架，上面排列著一列裝滿實景海水的巨大傾倒水槽；兩名技術人員站在吊架上，手放在釋放桿上。

>> 第一幀：已裝載完畢，準備就緒——船隻和海洋水槽佔據畫面右側中景，傾倒水槽高懸在布景上方；前景左側，距離手機不到 1 公尺處，三名穿著黑色 EFFECTS CREW T 恤的劇組人員站在矮型防水牆後方，其中一人操作軌道上的電影攝影機，另一人戴著耳機，舉起一隻手。地平線後方聳立著一面巨大的藍色色鍵布幕，上面有橘色十字標記。一支 technocrane 懸在布景上方。

>> 動作與物理效果：有人喊了一聲「開拍！」——傾倒水槽的閘門依序砰然打開，真實海水以沉重而湍急的水勢猛然沖過海洋布景；第一道浪先越過船首，接著沿著甲板奔流而下，扯掉救生艇、將微型欄杆整排折斷，然後重重撞上船身：下層甲板沉入水線之下，船首沒入水面，船尾在液壓萬向支架作用下越升越高，煙囪一座接一座倒塌，索具猛烈甩動，船身在中段裂開，船尾接著滑入翻湧的水中；海水越過防水牆邊緣，細密的水霧雲團席捲攝影棚地板，將畫面沖刷成一片白茫茫，劇組人員遮住臉、踉蹌後退。

>> 攝影機：攝影者起初站著，接著向後退，一手將手機舉在胸口高度；快速手持搖攝，跟隨動作從船首拍到船尾，構圖寬鬆、隨機應變；水霧雲團襲來時，畫面猛烈晃動；自動對焦在白茫茫的畫面中反覆搜尋；最後一刻，水滴黏附在鏡頭上；84° 寬角斜向視野，攝影機距離防水牆約 2 公尺。

>> 燈光：以頂部 LED 柔光板陣列作為主光源，位於攝影機一側的前上方，明亮、平衡日光色溫；曝光鎖定在反光的水面上，因此前景劇組人員看起來較暗；水霧雲團在面板的逆光照射下發光。

>> 音訊：片場環境音——大喊一聲「開拍！」、傾倒水槽閘門的金屬撞擊聲、奔騰水流的轟鳴聲、微型鋼材斷裂聲、船身解體時的呻吟聲，以及畫面外劇組人員大喊：「站在標記上別動！繼續拍！二號攝影機，跟住船尾！」

>> 真實的業餘智慧型手機拍攝效果，自然的手持晃動和果凍效應，真實實景特效，紀錄片式幕後花絮，沒有電影感構圖，沒有底片顆粒，沒有人工 mot

Behind-the-scenes phone footage from inside a large practical-effects soundstage, shot vertically on a handheld modern smartphone.

>> Scene context: a film crew is shooting the sinking of a miniature RMS Titanic. A gigantic practical ocean tank set, dressed as the North Atlantic, contains a 1:24 scale Titanic complete with illuminated portholes, four funnels, lifeboats, deck railings, rigging, cargo cranes, and miniature passengers. Above the tank, a scaffold gantry carries a row of huge dump tanks loaded with practical seawater; two techs stand on the gantry at the release levers.

>> First frame: already loaded and ready — the ship and ocean tank fill mid-ground screen-right, dump tanks looming above the set; in the foreground screen-left, within 1 meter of the phone, three crew in black EFFECTS CREW t-shirts stand behind a low containment wall, one on a cinema camera on rails, another on a headset with a hand raised. A huge blue chroma-key wall with orange cross markers rises behind the horizon. A technocrane hangs above the set.

>> Action and physics: a shout of “Action!” — the dump tank gates bang open in sequence and a massive surge of real water crashes across the ocean set with real weight and turbulence, the first wave breaking over the bow before racing along the decks, tearing away lifeboats, snapping miniature railings flat, then slamming into the ship: lower decks disappear beneath the waterline, the bow plunging under the surface, the stern rising higher under the hydraulic gimbal, funnels collapsing one after another as the rigging whips, the hull splitting apart at midships before the stern slides beneath the churn; the water bursts over the containment lip and a fine spray cloud rolls across the stage floor, whiting out the frame as the crew shield their faces and stumble back.

>> Camera: operator standing then backing away, phone in one hand at chest height, fast handheld pan following the action from bow to stern, framing loose and reactive, hard jolt as the spray cloud hits, autofocus hunting through the whiteout, water droplets clinging to the lens in the final beat, 84° wide diagonal FOV, camera about 2 meters from the containment wall.

>> Lighting: overhead LED soft panel grid as primary source, top-front on the camera side, bright daylight-balanced, exposure locked for the reflective water so foreground crew read darker; the spray cloud glows backlit under the panels.

>> Audio: on-set ambient — a loud “Action!”, the metallic clang of dump tank gates, the dense roar of cascading water, snapping miniature steel, the groan of the hull breaking apart, crew shouting off-camera: “Hold your marks! Keep rolling! Camera two, stay on the stern!”

>> Realistic amateur smartphone capture, natural handheld shake and rolling shutter, real practical effects, documentary behind-the-scenes footage, no cinematic composition, no film grain, no artificial mot