Ecommerce product photos on white → grounded floor shadows via FLUX.2 Klein 9B (SDNQ 4-bit) on Runpod Serverless.

Input

Field	Default	Notes
image / images	—	base64 JPEG/PNG
shadows	simple	simple | detailed
max_side	768
jpeg_quality	92

B64=$(base64 -w0 product.jpg)
curl -X POST "https://api.runpod.ai/v2/$ENDPOINT_ID/runsync" \
  -H "Authorization: Bearer $RUNPOD_API_KEY" \
  -H "Content-Type: application/json" \
  -d "{\"input\": {\"image\": \"$B64\", \"shadows\": \"detailed\"}}"

Response: { "images": ["<base64_jpeg>", ...], "count": N, "image": "..." } (image only when count == 1).

Deploy

docker build -t YOUR_USER/relight:latest .
docker push YOUR_USER/relight:latest

Mount network volume with weights at /runpod-volume/models/flux2-klein-9b-sdnq-4bit (MODEL_DIR). GPU: RTX 4090 24GB. Scale-to-zero by default; set workersMin=1 + EAGER_LOAD=1 for warm workers.