Scenes & light
Product Scene Swaps and Relighting with Flux Kontext (Without Warping the SKU)
A lifestyle image puts the product where the customer will use it: a mug on a kitchen counter, a serum on bathroom marble, a backpack on a trail. Generating those scenes is easy. Generating them without changing the product — the logo, the cap, the exact proportions — is the actual skill. Flux Kontext is our default model for this job.
Cutout first, always
When you ask a model to change the background of an uncut photo, it has to decide which pixels are product. That decision is where lids get taller and logos get redrawn. Cut out on background removal first, then generate the scene around a fixed object on product relighting.
Write the light, not just the place
Scenes look fake when the product's lighting does not match the background's. Name the light source, its direction and its quality:
- Direction: "window light from the left", "overhead softbox".
- Quality: "soft diffused", "hard midday sun with crisp shadows".
- Colour temperature: "warm golden hour", "neutral daylight 5500K".
- Shadow: "soft contact shadow falling to the right".
Prompt templates
Place this exact product on white Carrara marble in a bright bathroom, soft window light from the left, neutral daylight, subtle reflection on the marble, soft contact shadow to the right. Keep the bottle shape, cap, label text, logo and colour exactly unchanged.
Relight this product as if photographed at golden hour outdoors: warm low sun from behind-right, gentle rim light on the edges, long soft shadow. Do not change the product itself.
Fixing the usual problems
- Floating product: ask for a contact shadow, or add one with a masked inpaint at the base.
- Wrong scale: mention real-world size: "a 10 cm jar on a kitchen counter".
- Logo redrawn: regenerate from the cutout with a stronger lock list; composite the original product layer back over the result if needed.
- Inconsistent set: keep a single scene description and change only the camera angle; unify colour with style transfer.
Cost
At list price each scene is $0.038 on Flux Kontext dev, $0.045 on Flux 2 Pro edit. A four-scene lifestyle set with a retry each is about eight edits. Build whole sets in Marketing Studio.
| モデル | ベンダー | 1枚あたり | 向いているEC作業 |
|---|---|---|---|
| Qwen-Image Edit Plus | Qwen | $0.032 | ラベル・パッケージ文字の修正、部分補正 |
| Qwen-Image Edit | Qwen | $0.048 | 文字を理解した編集、不要物の除去 |
| Qwen Image 3.0 Edit | Qwen | $0.045 | 複数行テキスト、日中韓パッケージ |
| Flux Kontext Dev | Black Forest Labs | $0.038 | 商品を固定したまま背景・光を変更 |
| Flux Kontext Dev Lora | Black Forest Labs | $0.045 | ブランド調LoRAのシーン |
| FLUX.2 Pro Edit | Black Forest Labs | $0.045 | メイン画像、写実的なライフスタイル |
| FLUX.2 Flex Edit | Black Forest Labs | $0.075 | 細かな制御、タイポグラフィ |
| Seedream v4 Edit | ByteDance | $0.041 | バリエーションの一括生成 |
| Seedream v4.5 Edit | ByteDance | $0.054 | 高解像度のセット画像 |
| Tencent Image Upscaler | Community | $0.036 | モール用ズーム（2000px以上） |
| Youchuan V8.2 Remove Background | Midjourney | $0.13 | ワンクリック切り抜き |
よくある質問
Why does my product change shape when I change the background?
The model is re-deciding the product's boundary. Cut the product out first and generate the scene around the fixed cutout.
How do I make AI scenes look less fake?
Match light direction and colour between product and scene, and add a soft contact shadow. Most fake-looking composites fail on light, not on the background.
Flux Kontext or Flux 2 Pro for lifestyle scenes?
Kontext dev is cheaper per image ($0.038); Flux 2 Pro edit ($0.045) tends to be more photoreal for hero shots.
プロンプトの書き方に迷ったら？ワンクリックで白背景・背景合成・文字修正テンプレートを挿入
かんたん指示テンプレート
やりたい作業を選ぶだけで、最適な指示文を作成
「白背景」「シーン合成」「パッケージ文字修正」「モデル試着」から選ぶだけで、商品の形やロゴを崩さない指示文が完成します。
正面のメイン商品アングル、輪郭くっきり。ゴールドのスポイト付きガラス製美容液ボトル。ブランドのロゴとラベル文字は100%そのまま維持する，純白 #FFFFFF 背景＋柔らかな接地影。